0.2.143

Add few more radio documentation pages

.gitignore

@@ -1,9 +1,11 @@
 node_modules
+yotta_modules
+yotta_targets
 built
 typings
 tmp
 temp
-projects
+projects/**
 win10/app/bin
 win10/app/bld
 win10/*.opendb

README.md

@@ -1,7 +1,7 @@
 # micro:bit target for PXT
 
 This target allow to program a [BBC micro:bit](https://www.microbit.co.uk/) using 
-[Microsoft Programming Experience Toolkit](https://github.com/Microsoft/pxt).
+PXT ([Microsoft Programming Experience Toolkit](https://github.com/Microsoft/pxt)).
 
 * [Try it live](https://m.pxt.io)
 
@@ -28,17 +28,26 @@ Run this command to open a local web server:
 ```
 pxt serve
 ```
+If the local server opens in the wrong browser, make sure to copy the URL containing the local token. 
+Otherwise, the editor will not be able to load the projects.
+
+If you need modify the `.cpp` files, turn on yotta compilation with the ``-yt`` flag:
+```
+pxt serve -yt
+```
+
 To make sure you're running the latest tools, run
 ```
 npm update
 ```
 
+
 More instructions at https://github.com/Microsoft/pxt#running-a-target-from-localhost 
 
 ## Universal Windows App
 
 The Windows 10 app is a [Universal Windows Hosted Web App](https://microsoftedge.github.io/WebAppsDocs/en-US/win10/CreateHWA.htm)
-that wraps m.pxt.io and provides additional features.
+that wraps ``m.pxt.io`` and provides additional features.
 
 ### Building
 

cmds/tsconfig.json

@@ -8,6 +8,6 @@
         "module": "commonjs",
         "rootDir": ".",
         "newLine": "LF",
-        "sourceMap": true
+        "sourceMap": false
     }
 }

docs/device/contents.md

@@ -1,6 +1,6 @@
 # micro:bit - the device
 
-The micro:bit device #docs
+The micro:bit device
 
 The micro:bit is a very capable device with many components:
 

docs/device/error-codes.md

@@ -1,6 +1,6 @@
 # Error codes
 
-The micro:bit error codes #docs
+The micro:bit error codes
 
 Your micro:bit may encounter a situation that prevents it from running your code. When this happens, a frowny face will appear on your micro:bit screen (see picture) followed by an error number.
 

docs/device/reactive.md

@@ -1,6 +1,6 @@
 # The micro:bit - a reactive system
 
-The micro:bit is a reactive system. #docs
+The micro:bit is a reactive system.
 
 ### Computing systems
 

docs/getting-started.md

@@ -1,36 +1,17 @@
 # Getting started
 
-Are you ready to build cool BBC micro:bit programs? For each challenge, reorder the blocks to recreate the program.
+Are you ready to build cool BBC micro:bit programs?
 
-## Open [https://m.pxt.io](/) and create a new **Blocks Editor** project
+Here are some challenges for you.  Unscramble the blocks in the editor
+to make real programs that work!
 
-## Basic
+### Happy face
 
-### Show leds
-
-Use the blocks below to draw a figure on the screen. You can redo the smiley face or try something else!
-
-```shuffle
-basic.showLeds(`
-    . . . . .
-    . # . # .
-    . . . . .
-    # . . . #
-    . # # # .
-    `)
-```
-
-To transfer your code to the BBC micro:bit, 
-* connect your micro:bit to the computer using the USB cable
-* click on **Download**
-* drag&drop the **.hex** file into the **MICROBIT** drive
-* wait till the yellow light is done blinking!
-
-### Show animation Forever
-
-Show one image after the other to create an animation by snapping them together.
+You should see three blocks in the editor to the left.
+These are a block with a smiley face, ...
 
 ```blocks
+basic.forever(() => {
     basic.showLeds(`
         . . . . .
         . # . # .
@@ -40,20 +21,26 @@ Show one image after the other to create an animation by snapping them together.
         `)
     basic.showLeds(`
         . . . . .
-        . # . # .
         . . . . .
-        . # # # .
-        # . . . #
+        . . . . .
+        . . . . .
+        . . . . .
         `)
+});
 ```
 
+To move your program from your computer to the BBC micro:bit:
+* Connect your micro:bit to the computer with the USB cable.
+* Click **Compile**.
+* Drag and drop the new file whose name ends in **.hex** into the **MICROBIT** window.
+* Wait until the yellow light stops blinking!
 
-### Repeat forever
+### Happy unhappy face
 
-Use the ``forever`` block to repeat your code and have a continuous animation.
+Let's draw an unhappy face instead of the blank screen. Click on the dots in the ``show leds`` block
+until it matches the blocks below.
 
-Unsuffle the blocks to create a happy, unhappy animation.... or changes the image to make it your own!
-```shuffle
+```blocks
 basic.forever(() => {
     basic.showLeds(`
         . . . . .
@@ -72,39 +59,82 @@ basic.forever(() => {
 });
 ```
 
-### Your turn now!
+To move your program from your computer to the BBC micro:bit:
+* Connect your micro:bit to the computer with the USB cable.
+* Click **Compile**.
+* Drag and drop the new file whose name ends in **.hex** into the **MICROBIT** window.
+* Wait until the yellow light stops blinking!
 
-Use the blocks ``show leds`` and ``forever``
-to create your own custom awesome animation!
+### Your turn!
 
-## Inputs
-
-### Button A and B
-
-Unshuffle the blocks so that the micro:bit shows "YES" when button A is pressed, and "NO" when B is pressed. 
-The key idea is that all the blocks nested under `on button ... pressed` will run when that button is pressed.
+Pile up more ``show leds`` blocks to create your animation! Create an animation with at least 5 images.
 
 ```blocks
-input.onButtonPressed(Button.A, () => {
-    basic.showString("AAAAA");
+basic.forever(() => {
+    basic.showLeds(`
+        . . . . .
+        . # . # .
+        . . . . .
+        # . . . #
+        . # # # .
+        `)
+    basic.showLeds(`
+        . . . . .
+        . # . # .
+        . . . . .
+        . # # # .
+        # . . . #
+        `)
+    basic.showLeds(`
+        . . . . .
+        . # . # .
+        . . . . .
+        # # # # #
+        . . . . .
+        `)
 });
 ```
 
-Try to unshuffle those blocks:
-```shuffle
+To move your program from your computer to the BBC micro:bit:
+* Connect your micro:bit to the computer with the USB cable.
+* Click **Compile**.
+* Drag and drop the new file whose name ends in **.hex** into the **MICROBIT** window.
+* Wait until the yellow light stops blinking!
+
+#### ~hint
+
+You can find the ``show leds`` block under the **Basic** category.
+#### ~
+
+### Button A and B
+
+This program will show the word `banana` on the LED
+screen when you press button `A`.
+
+```blocks
 input.onButtonPressed(Button.A, () => {
-    basic.showString("YES");
+    basic.showString("banana");
 });
+```
+
+Now try to unscramble these blocks in the editor so that the micro:bit
+shows **apple** when you press button `B`.
+
+```shuffle
 input.onButtonPressed(Button.B, () => {
-    basic.showString("NO");
+    basic.showString("apple");
 });
 ```
 
 ### Shake
 
-Using the data from the **accelerometer**, it is possible to detect that the BBC micro:bit is being shaken.
+You can find when someone is shaking the BBC micro:bit by checking its
+**accelerometer** (it finds whether the micro:bit is speeding up or
+slowing down).
+
+Unscramble these blocks in the editor to show a frownie when someone
+shakes the micro:bit.
 
-Unshuffle the code to display a frownie when shaken.
 ```shuffle
 input.onGesture(Gesture.Shake, () => {
     basic.showLeds(`
@@ -116,12 +146,18 @@ input.onGesture(Gesture.Shake, () => {
 });
 ```
 
-### Tilting
+### Tilting with gestures
 
-Aside from shake, it is also possible to detect tilt left and right, logo up and down or face up and down.
-Let's build a rock paper scissors game where you turn the micro:bit left to display paper, right to display scissors and down to display rock.
+You can also find when someone is tilting the micro:bit left or right,
+face up or face down, and logo up or logo down (the logo is the yellow
+oval picture at the top of the board).
+
+Try to build a Rock Paper Scissors game where you tilt the micro:bit
+left to show paper, right to show scissors, and down to show rock.
+
+Unscramble these blocks in the editor and try this program on the
+micro:bit itself!
 
-Unshuffle and try this code on the micro:bit itself!
 ```shuffle
 input.onGesture(Gesture.TiltLeft, () => {
     basic.showLeds(`
@@ -151,10 +187,14 @@ input.onGesture(Gesture.TiltRight, () => {
 
 ### Pins
 
-It is possible to use the pins (big metal bar at the bottom of the board) as button. Hold the ``GND`` button with one hand and press the ``0`` pin 
-(called ``P0``) with the other hand to trigger a pin pressed.
+You can also use the pins as buttons.  (The pins are the holes in the
+metal bar at the bottom of the micro:bit board.)  For example, hold
+the ``GND`` button with one hand and touch the ``0`` pin (called
+``P0``) with your other hand to tell the micro:bit you're pressing it.
+
+Unscramble the blocks in the editor to show a smiley when you press
+pin ``P0``.
 
-Unshuffle the blocks to display a smiley when pin ``P0`` is pressed.
 ```shuffle
 input.onPinPressed(TouchPin.P0, () => {
     basic.showLeds(`
@@ -166,6 +206,7 @@ input.onPinPressed(TouchPin.P0, () => {
 });
 ```
 
-### Your turn now!
+### Your turn!
 
-Use the scree, buttons, gestures, pins to create a fun game using the micro:bit.
+Use the screen, buttons, gestures, and pins to make your own fun game
+with the BBC micro:bit!

docs/lessons.md

@@ -34,7 +34,7 @@
 * [Rock Paper Scissors](/lessons/rock-paper-scissors), create the classic game of rock paper scissors with if statement
 * [Truth or Dare](/lessons/truth-or-dare), a game that forces each player to reveal a secret or do something funny with if statement
 * [Spinner](/lessons/spinner), spin the arrow with multiple if statements
-* [Die Roll](/lessons/die-roll), spin with more if statements
+* [Dice Roll](/lessons/dice-roll), spin with more if statements
 * [Looper](/lessons/looper), display a series of numbers with a for loop index
 * [Strobe Light](/lessons/strobe-light), develop shapes with a nested for loops
 * [Temperature](/lessons/temperature), get the ambient temperature (degree Celsius °C)
@@ -59,6 +59,7 @@
 
 ## Science
 * [Charting](/lessons/charting), measure and chart acceleration
+* [Seismograph](/lessons/seismograph), create a seismograph with household items
 
 ## Advanced
 * [Prank WiFi](/lessons/prank-wifi), create fake WiFi to trick your friends

docs/lessons/answering-machine.md

@@ -1,8 +1,6 @@
 # answering machine blocks lesson
 
-create an answering machine on the BBC micro:bit #docs
-
-### @video td/videos/answering-machine-0
+Create an answering machine on the BBC micro:bit
 
 ## Topic
 
@@ -25,12 +23,8 @@ Learn how to creating a message with a **string**, `show string` to write your m
 ```cards
 basic.showString('Hi!')
 input.onButtonPressed(Button.A, () => {})
-
 ```
 
-
-* **on button pressed** : [read more...](/reference/input/on-button-pressed)
-
 ## Objectives
 
 * learn how to show a string on the LED screen one character at a time

docs/lessons/answering-machine/activity.md

@@ -4,7 +4,6 @@ Learn to create an answering machine on the micro:bit
 
 ### ~avatar avatar
 
-### @video td/videos/answering-machine-0
 
 Let's learn how to create an answering machine!
 

docs/lessons/answering-machine/challenges.md

@@ -12,8 +12,6 @@ basic.showString("ASK ME A QUESTION")
 
 ### Challenge 1
 
-### @video td/videos/answering-machine-1
-
 Now we need to reply after someone asks micro:bit a  yes or no question. We want to respond `YES` when button `A` is pressed. Add a condition for button `A` and inside it show the string `YES`.
 
 ```blocks
@@ -27,8 +25,6 @@ input.onButtonPressed(Button.A, () => {
 
 ### Challenge 2
 
-### @video td/videos/answering-machine-2
-
 What if micro:bit's answer to the question is no? Let's have `NO` be displayed when button `B` is pressed. Add a condition for button `B` and inside it show the string `NO`.
 
 ```blocks

docs/lessons/beautiful-image.md

@@ -1,8 +1,6 @@
 # beautiful image lesson
 
-display beautiful images on the BBC micro:bit.
-
-### @video td/videos/beautiful-image-0
+Display beautiful images on the BBC micro:bit.
 
 ## Topic
 

docs/lessons/beautiful-image/activity.md

@@ -4,8 +4,6 @@ Generate and show a beautiful image.
 
 ### ~avatar avatar
 
-### @video td/videos/beautiful-image-0
-
 Let's learn how to show an image on the LED screen.
 
 ### ~

docs/lessons/beautiful-image/challenges.md

@@ -18,8 +18,6 @@ basic.showLeds(`
 
 ### Challenge 1
 
-### @video td/videos/beautiful-image-1-2
-
 Now show an new image that will display on the micro:bit.
 
 ```blocks

docs/lessons/beautiful-image/tutorial.md

@@ -0,0 +1,48 @@
+# beautiful image blocks challenges
+
+Beautiful Image tutorial. 
+
+### ~avatar avatar
+
+### @video td/videos/beautiful-image-0
+
+Rebuild the game!
+
+The blocks have been shuffled! Put them back together so that…
+
+* display images on the screen with show LEDs
+
+
+```shuffle
+basic.showLeds(`
+    # # # # #
+    # # . # #
+    # . # . #
+    # # . # #
+    # # # # #
+    `)
+basic.showLeds(`
+    # . # . #
+    . # # # .
+    . . # . .
+    . # # # .
+    # . # . #
+    `)
+basic.pause(100)
+```
+
+Hints and tips
+
+Cut out these documentation cards to help you!
+
+```cards
+basic.showLeds(`
+    . . . . .
+    . . . . .
+    . . # . .
+    . . . . .
+    . . . . .
+    `)
+basic.pause(100)
+
+```

docs/lessons/blink.md

@@ -2,8 +2,6 @@
 
 Learn how to create a blinking LED.
 
-### @video td/videos/blink-0
-
 ## Topic
 
 Plot
@@ -30,7 +28,6 @@ basic.pause(100)
 basic.forever(() => {})
 ```
 
-
 ## Objectives
 
 * learn how to turn on LED lights on the LED screen

docs/lessons/blink/activity.md

@@ -4,7 +4,15 @@ Turn an LED on and off with forever
 
 ### ~avatar avatar
 
-### @video td/videos/blink-0
+```sim
+basic.forever(() => {
+    led.plot(2, 2)
+    basic.pause(500)
+    led.unplot(2, 2)
+    basic.pause(500)
+})
+```
+Let's build a blinking light!
 
 ### ~
 
@@ -43,7 +51,6 @@ basic.forever(() => {
     led.unplot(2, 2)
     basic.pause(500)
 })
-
 ```
 
 ### ~avatar boothing

docs/lessons/blink/challenges.md

@@ -17,8 +17,6 @@ basic.forever(() => {
 
 ### Challenge 1
 
-### @video td/videos/blink-1
-
 Let's display a "smiley face" on the screen! We'll start by plotting the eyes.
 
 Add `plot(1,1)` and `plot(3,1)` under `plot(2,2)` ; then add `unplot(1,1)`, `unplot(3,1)` and `unplot(2,2)` after `pause`. When you're ready, don't forget to run your code to try it out!
@@ -38,8 +36,6 @@ basic.forever(() => {
 
 ### Challenge 2
 
-### @video td/videos/blink-2
-
 Let's add the code to plot the mouth by using `plot` and `unplot` to the following coordinates: (1,4), (2,4) and (3,4). When you're ready, don't forget to run your code to try it out!
 
 ```blocks
@@ -63,8 +59,6 @@ basic.forever(() => {
 
 ### Challenge 3
 
-### @video td/videos/blink-3
-
 Let's keep using `plot` to convert the mouth into a smiley face.
 
 ```` bitmatrix

docs/lessons/blocks-conditions.md

@@ -1,6 +1,6 @@
 # blocks - if statements
 
-An introduction to conditions for the Block Editor. #docs
+An introduction to conditions for the Block Editor.
 
 ## Introduction to conditions
 

docs/lessons/bop-it/activity.md

@@ -1,6 +1,6 @@
 # bop it challenges
 
-a game similar to "Simon Says" with the BBC micro:bit. #docs
+a game similar to "Simon Says" with the BBC micro:bit.
 
 ## Before we get started
 

docs/lessons/catch-the-egg-game.md

@@ -2,8 +2,6 @@
 
 A game to catch eggs in a basket.
 
-### @video td/videos/catch-the-egg-game-0
-
 ## Topic
 
 Variables

docs/lessons/catch-the-egg-game/activity.md

@@ -108,8 +108,6 @@ basic.forever(() => {
 
 ### Challenge 3
 
-### @video td/videos/catch-the-egg-game-4
-
 Let's make the egg fall faster by decreasing the amount of time it pauses in each position by decreasing **falling pause** by `25` every 5 catches. Now, instead of pausing for 300 milliseconds we can pause for the value of **falling pause**.
 
 ```blocks

docs/lessons/challenges.md

@@ -1,6 +1,6 @@
 # blocks - challenges
 
-Extra stuff for the Block Editor - an introduction to GPIO #docs
+Extra stuff for the Block Editor - an introduction to GPIO
 
 ## Before we get started
 

docs/lessons/charting.md

@@ -7,7 +7,7 @@ Create a charting app for simulating and measuring the acceleration applied to t
 Acceleration
 
 ## Quick Links
-* [activity](/lessons/charting/acceleration) 
+* [activity](/lessons/charting/activity) 
 * [challenge](/lessons/charting/challenge) 
 * [quiz](/lessons/charting/quiz) 
 * [answers](/lessons/charting/quiz-answers)

docs/lessons/charting/activity.md

@@ -13,7 +13,6 @@ Let's measure `acceleration (mg)` in the "x" direction. Get the acceleration val
 
 ```blocks
 input.acceleration(Dimension.X)
-
 ```
 
 ### ~
@@ -41,7 +40,7 @@ Vigorously move the micro:bit in the micro:bit simulatator by moving the micro:b
 
 We want to chart the data collected by using a tool in Excel. 
 
-The final part of this experiment is opening and reviewing the data in the Excel CSV file. Simply click on the line beneath the simulator. A CSV file will be generated to display the data points collected by moving the micro:bit in the X direction. Then click or tap on the data Excel file that was downloaded to your local Downloads Folder. 
+The final part of this experiment is opening and reviewing the data in the Excel CSV file. Simply click on the line beneath the simulator. A CSV file will be generated to display the data points collected by moving the micro:bit in the X direction. Then click or tap on the data Excel file that was downloaded to your local ``Downloads`` Folder. 
 
 
 ### ~
@@ -57,29 +56,13 @@ Use the Recommended Charts command on the Insert tab to quickly create a chart t
 
 * Click Insert > Recommended Charts.
 
-![](/static/mb/chart1.png)
+![](/static/mb/lessons/chart1.png)
 
-* On the Recommended Charts tab, scroll through the list of chart types that Excel recommends for your data.
-
-Click any chart type to see how your data will look in that format. 
-
-When you find the chart type that you want, click it, and then click OK. We want to select the chart called Line. A line chart is used to display trends over time. We will use the line chart because there are many data points over time. 
-
-Tip: If you don’t see a chart type that you want, click the All Charts tab to see all of the available chart types.
-
-![](/static/mb/chart_title.png)
-
-* Use the Chart Elements, Chart Styles, and Chart Filters buttons next to the upper-right corner of the chart to add chart elements like axis titles or data labels, to customize the look of your chart
-
-![](/static/mb/elements_styles_filters.png)
-
-* Connect a micro:bit to your computer using your USB cable; compile; and repeat this experiment by moving the micro:bit in the "x" direction. Then collect and chart the data on Excel. 
-* Review and analyze the actual micro:bit device data on Excel
-* Display acceleration with y or z using plot bar graph by changing acceleration from "x" to "y" or "z" 
+* On the Recommended Charts tab, scroll through the list of chart types that Excel recommends for your data. Pick the **scatter plot**.
 
 ### ~avatar avatar
 
-Excellent, you're ready to continue with the [challenges](/lessons/charting/acceleration-challenge)
+Excellent, you're ready to continue with the [challenges](/lessons/charting/challenge)
 
 ### ~
 

docs/lessons/charting/challenge.md

@@ -2,7 +2,8 @@
 
 ### ~avatar avatar 
 
-Welcome! The activity will teach you how to use the acceleration of the 1st micro:bit and to visualize the acceleration on the 2nd micro:bit. Let's get started!
+Welcome! The activity will teach you how to use the acceleration of the 1st micro:bit and to visualize the acceleration on the 2nd micro:bit. 
+Let's get started!
 
 ### ~
 Let's measure `acceleration (mg)` and then `send number`. `Acceleration` is measured in **milli-gravities**, so a value of -1000 is equivalent to -1g or -9.81m/s^2. We will be able to get the acceleration value (g-force), in the specified "x" dimension. `Send number` will broadcast a number data packet to other micro:bits connected via radio.
@@ -52,7 +53,7 @@ Notice that moving the micro:bit the farthest direction in the x direction will
 NOTE: The colors of the charts reflect the color of the micro:bit simulator. In this instance, the micro:bits are blue and green. So the colors of the line graphs reflect the colors of the micro:bit
  
  ### ~
-After running this simulatation several seconds by moving the micro:bit side to side in the x direction, you are ready to graph or chart the accceleration of the micro:bit.  We want a printout of our acceleration on Excel. We will graph the fluctuating acceleration of the simulation experiment. 
+After running this simulation several seconds by moving the micro:bit side to side in the x direction, you are ready to graph or chart the accceleration of the micro:bit.  We want a printout of our acceleration on Excel. We will graph the fluctuating acceleration of the simulation experiment. 
 
 ![](/static/mb/acc2.png)
 
@@ -67,15 +68,9 @@ Use the Recommended Charts command on the Insert tab to quickly create a chart t
 
 * Click Insert > Recommended Charts.
 
-![](/static/mb/chart1.png)
+![](/static/mb/lessons/chart1.png)
 
-* On the Recommended Charts tab, scroll through the list of chart types that Excel recommends for your data.
-
-Click any chart type to see how your data will look in that format. 
-
-When you find the chart type that you want, click it, and then click OK. We want to select the chart called Line. A line chart is used to display trends over time. We will use the line chart because there are many data points over time. 
-
-Tip: If you don’t see a chart type that you want, click the All Charts tab to see all of the available chart types.
+* On the Recommended Charts tab, scroll through the list of chart types that Excel recommends for your data. Pick the **scatter plot**.
 
 ![](/static/mb/chart_title.png)
 
@@ -91,4 +86,3 @@ Have fun reviewing your simulation and analyze the acceleration by chart the Exc
 * The first person and second person take turns tilting the micro:bit in the "x" direction while the other player charts the data on the micro:bit!
 * Review and analyze the actual micro:bit device acceleration data on Excel
 * Display acceleration with y or z using plot bar graph by changing acceleration from "x" to "y" or "z" 
-

docs/lessons/compass.md

@@ -2,8 +2,6 @@
 
 create a die on the BBC micro:bit.
 
-### @video td/videos/compass-0
-
 ## Topic
 
 If (Conditionals)

docs/lessons/counter.md

@@ -2,8 +2,6 @@
 
 Learn how to create a counter with with on button pressed.
 
-### @video td/videos/counter-0
-
 ## Topic
 
 Variables

docs/lessons/counter/activity.md

@@ -4,8 +4,6 @@ Display a number with a variable.
 
 ### ~avatar avatar
 
-### @video td/videos/counter-0
-
 Welcome! This tutorial will teach you how to make a counter that increments when button A is pressed. Let's get started!
 
 ### ~

docs/lessons/counter/challenges.md

@@ -16,8 +16,6 @@ input.onButtonPressed(Button.A, () => {
 
 ### Challenge 1
 
-### @video td/videos/counter-1-2
-
 Let's add the code to `count` when `B` is pressed. Add an event handler with `on button pressed(B)` then add the code to `count`.
 
 
@@ -33,7 +31,6 @@ input.onButtonPressed(Button.B, () => {
 })
 ```
 
-
 ### Challenge 3
 
 Now let's try to reset the counter when the micro:bit is shaken. You will need to register an event handler with `on shake`.

docs/lessons/dice-roll.md

@@ -1,8 +1,6 @@
-# die roll lesson
+# dice roll lesson
 
-create a die on the BBC micro:bit.
-
-### @video td/videos/die-roll-0
+Create a  dice on the BBC micro:bit.
 
 ## Topic
 
@@ -10,10 +8,10 @@ If (Conditionals)
 
 ## Quick Links
 
-* [activity](/lessons/die-roll/activity)
-* [challenges](/lessons/die-roll/challenges)
-* [quiz](/lessons/die-roll/quiz)
-* [quiz answers](/lessons/die-roll/quiz-answers)
+* [activity](/lessons/dice-roll/activity)
+* [challenges](/lessons/dice-roll/challenges)
+* [quiz](/lessons/dice-roll/quiz)
+* [quiz answers](/lessons/dice-roll/quiz-answers)
 
 ## Prior learning/place of lesson in scheme of work
 

docs/lessons/dice-roll/activity.md

@@ -1,12 +1,10 @@
-# die roll activity
+# dice roll activity
 
-Create a die on the micro:bit
+Create a dice on the micro:bit
 
 ### ~avatar avatar
 
-### @video td/videos/die-roll-0
-
-Welcome! This tutorial will help you create a die. Let's get started!
+Welcome! This tutorial will help you create a dice. Let's get started!
 
 ### ~
 
@@ -19,7 +17,7 @@ input.onGesture(Gesture.Shake, () => {
 })
 ```
 
-We need to show a random value from 1 to 6 on our die. So let's make a local variable called **roll**.
+We need to show a random value from 1 to 6 on our dice. So let's make a local variable called **roll**.
 
 ```blocks
 input.onGesture(Gesture.Shake, () => {
@@ -27,7 +25,7 @@ input.onGesture(Gesture.Shake, () => {
 })
 ```
 
-We need a condition for if **roll** is 5. We will show a `6` if **roll** is 5 because **roll** has a range from 0 to 5. We can use `show LEDs` to display the side of a die that shows 6.
+We need a condition for if **roll** is 5. We will show a `6` if **roll** is 5 because **roll** has a range from 0 to 5. We can use `show LEDs` to display the side of a dice that shows 6.
 
 
 ```blocks
@@ -45,7 +43,7 @@ input.onGesture(Gesture.Shake, () => {
 ```
 
 
-Let's use an `else if` condition for if **roll** is 4. If **roll** is 4 we can show 5 dots on the die.
+Let's use an `else if` condition for if **roll** is 4. If **roll** is 4 we can show 5 dots on the dice.
 
 
 ```blocks
@@ -72,7 +70,7 @@ input.onGesture(Gesture.Shake, ()=> {
 ```
 
 
-Now we need to repeat the same steps for if **roll** is 3. If **roll** is 3 we will show `4` on the die.
+Now we need to repeat the same steps for if **roll** is 3. If **roll** is 3 we will show `4` on the dice.
 
 
 ```blocks
@@ -106,7 +104,7 @@ input.onGesture(Gesture.Shake, () => {
 ```
 
 
-Let's also repeat these steps to show the 3, 2, and 1 on the die. We are almost done with our die!
+Let's also repeat these steps to show the 3, 2, and 1 on the dice. We are almost done with our dice!
 
 ```blocks 
 input.onGesture(Gesture.Shake, () => {
@@ -165,7 +163,7 @@ input.onGesture(Gesture.Shake, () => {
 
 ### ~avatar avatar
 
-Excellent, you're ready to continue with the [challenges](/lessons/die-roll/challenges)!
+Excellent, you're ready to continue with the [challenges](/lessons/dice-roll/challenges)!
 
 ### ~
 

docs/lessons/dice-roll/challenges.md

@@ -1,10 +1,10 @@
-# die roll challenges
+# dice roll challenges
 
-Create a die on the micro:bit. 
+Create a dice on the micro:bit. 
 
 ## Before we get started
 
-Complete the following [guided tutorial](/lessons/die-roll/activity), your code should look like this:
+Complete the following [guided tutorial](/lessons/dice-roll/activity), your code should look like this:
 
 ```blocks 
 input.onGesture(Gesture.Shake, () => {
@@ -62,7 +62,7 @@ input.onGesture(Gesture.Shake, () => {
 
 ### Challenge 1
 
-Modify the line of code with `pick random` so that only number 1-4 can appear on the die.
+Modify the line of code with `pick random` so that only number 1-4 can appear on the dice.
 
 
 ```blocks 
@@ -121,7 +121,7 @@ input.onGesture(Gesture.Shake, () => {
 
 ### Challenge 2
 
-Let's make a trick die! Modify the line of code with `pick random` so that only numbers 3-6 can appear on the die. Also note that we need to ensure `roll = 0` when only 1 dot is shown on the BBC micro:bit.
+Let's make a trick dice! Modify the line of code with `pick random` so that only numbers 3-6 can appear on the dice. Also note that we need to ensure `roll = 0` when only 1 dot is shown on the BBC micro:bit.
 
 ```blocks 
 input.onGesture(Gesture.Shake, () => {

docs/lessons/dice-roll/quiz-answers.md

@@ -1,8 +1,8 @@
-# die roll quiz answers
+# dice roll quiz answers
 
-Create a die when the BBC micro:bit is shaken 
+Create a dice when the BBC micro:bit is shaken 
 
-These are the answers to the [die roll quiz](/lessons/die-roll/quiz).
+These are the answers to the [dice roll quiz](/lessons/dice-roll/quiz).
 
 ## 1. Create a variable named 'roll' that will be randomly assigned to a number between 0 and 5.
 

docs/lessons/dice-roll/quiz.md

@@ -1,12 +1,12 @@
-# die roll quiz
+# dice roll quiz
 
-Create a die when the BBC micro:bit is shaken 
+Create a dice when the BBC micro:bit is shaken 
 
 ## Name
 
 ## Directions
 
-Use this activity document to guide your work in the [die roll tutorial](/lessons/die-roll/activity).
+Use this activity document to guide your work in the [dice roll tutorial](/lessons/dice-roll/activity).
 
 Answer the questions while completing the tutorial. Pay attention to the dialogues!
 

docs/lessons/digi-yoyo.md

@@ -1,8 +1,6 @@
 # digi yoyo lesson
 
-create a counter with a while loop.
-
-### @video td/videos/digi-yoyo-0
+Create a counter with a while loop.
 
 ## Topic
 

docs/lessons/digi-yoyo/activity.md

@@ -4,8 +4,6 @@ Create a counter with a while loop.
 
 ### ~avatar avatar
 
-### @video td/videos/digi-yoyo-0
-
 Welcome! This tutorial will teach how to create a counter with a while loop. Let's get started!
 
 ### ~

docs/lessons/digi-yoyo/challenges.md

@@ -40,8 +40,6 @@ while (count > 0) {
 
 ### Challenge 2
 
-### @video td/videos/digi-yoyo-1-2
-
 Inside of the while loop, let's add `pause->(1000)` so that we have a pause between each number as it's counting down. Also, let's show `count`!
 
 

docs/lessons/flashing-heart.md

@@ -2,8 +2,6 @@
 
 Learn how to create LED images with a global variable.
 
-### @video td/videos/flashing-heart-0
-
 ## Topic
 
 Pause

docs/lessons/flashing-heart/activity.md

@@ -4,8 +4,6 @@ Control images with a variable.
 
 ### ~avatar avatar
 
-### @video td/videos/flashing-heart-0
-
 In this activity, you will learn how to blink an image on the LED screen.
 
 ### ~

docs/lessons/flashing-heart/challenges.md

@@ -25,8 +25,6 @@ basic.forever(() => {
 
 ### Challenge 1
 
-### @video td/videos/flashing-heart-1
-
 Let's plot a different image. Let's display a broken heart!
 
 To do this, you need to add a block between the last line and the end loop. Add a `show LEDs` block and then add a `pause` of 500 milliseconds.
@@ -60,8 +58,6 @@ basic.forever(() => {
 
 ### Challenge 2
 
-### @video td/videos/flashing-heart-2
-
 Now let's alternate flashing the heart and the broken heart. To do this, we need to add a `clear screen` block and then add a `pause` block of 500 milliseconds under the new code we added in Challenge 1.
 
 

docs/lessons/game-counter.md

@@ -2,8 +2,6 @@
 
 Learn how to create a counter with with on button pressed.
 
-### @video td/videos/counter-0
-
 ## Topic
 
 Game Library

docs/lessons/game-counter/activity.md

@@ -1,13 +1,5 @@
 # game counter activity
 
-Turn an LED on and off with forever loop
-
-### ~avatar avatar
-
-### @video td/videos/counter-0
-
-### ~
-
 Have you ever tried to create a game counter? The concept is fairly simply: increase the game `score` with `on button pressed` .
 
 Let's start by adding `on button (A) pressed` will run each time the user presses A. Let's add a line of code that increments `score` by `1`.

docs/lessons/game-counter/challenges.md

@@ -15,8 +15,6 @@ input.onButtonPressed(Button.A, () => {
 
 ### Challenge 1
 
-### @video td/videos/counter-1-2
-
 Let's add the code to `score` when `B` is pressed. Add an event handler with `on button (B) pressed` then add the code to `score`.
 
 

docs/lessons/game-of-chance.md

@@ -1,6 +1,6 @@
 # game of chance blocks lesson
 
-create an answering machine on the BBC micro:bit #docs
+create an answering machine on the BBC micro:bit
 
 ## Topic
 

docs/lessons/graphics.md

@@ -1,6 +1,6 @@
 # blocks - rendering graphics
 
-An introduction to graphics for the Block Editor. #docs
+An introduction to graphics for the Block Editor.
 
 ## Before we get started
 

docs/lessons/guess-the-number.md

@@ -2,8 +2,6 @@
 
 Learn to create a random number with input from button A.
 
-### @video td/videos/guess-the-number-0
-
 ## Topic
 
 Math - Pick Random

docs/lessons/guess-the-number/activity.md

@@ -4,8 +4,6 @@ Guess the number with math random.
 
 ### ~avatar avatar
 
-### @video td/videos/guess-the-number-0
-
 Welcome! This tutorial will help you create a guess the number game! Let's get started!
 
 ### ~

docs/lessons/guess-the-number/challenges.md

@@ -15,8 +15,6 @@ input.onButtonPressed(Button.A, () => {
 
 ### Challenge 1
 
-### @video td/videos/guess-the-number-2
-
 When button `B` is pressed, we want to clear the screen. This will make it so users can play your game over and over again! Add an event handler to handle this case.
 
 ```blocks

docs/lessons/guess-the-number/tutorial.md

@@ -2,8 +2,6 @@
 
 ### ~avatar avatar
 
-### @video td/videos/guess-the-number-0
-
 This tutorial will help you create a guess the number game! Let's get started!
 
 ### ~

docs/lessons/looper.md

@@ -2,8 +2,6 @@
 
 Learn to control blinking LEDs.
 
-### @video td/videos/looper-0
-
 ## Topic
 
 For Loop

docs/lessons/looper/activity.md

@@ -1,13 +1,5 @@
 # looper blocks activity
 
-Display a series of numbers with a for loop. 
-
-### ~avatar avatar
-
-### @video td/videos/looper-0
-
-### ~
-
 Welcome! This activity will teach how to display a series of numbers for a for loop. Let's get started!
 
 Let's create a for loop where `0` is the loop's starting value, `i` is the index variable, and `5` is the ending value. The index variable `i` starts at 0 and increases by 1 each time through the loop. The loop ends when `i = 5`.

docs/lessons/looper/challenges.md

@@ -20,8 +20,6 @@ for (let i = 0; i < 6; i++) {
 
 ### Challenge 1
 
-### @video td/videos/looper-1
-
 What if we want to count up to lucky number 7 instead? Let's do that by changing the ending value to `7` instead of `5`.
 
 
@@ -37,8 +35,6 @@ for (let i = 0; i < 8; i++) {
 
 ### Challenge 2
 
-### @video td/videos/looper-2
-
 What about 9? Let's do that by changing the ending value to `9`.
 
 ```blocks
@@ -55,8 +51,6 @@ for (let i = 0; i < 10; i++) {
 
 ### Challenge 3
 
-### @video td/videos/looper-3
-
 Now let's start counting from `3` instead! Our for loop will always start at `0` so we simply add `3` to the `i` variable when passing it to `show number`.
 
 ```blocks
@@ -72,8 +66,6 @@ Run it on the simulator!
 
 ### Challenge 4
 
-### @video td/videos/looper-4
-
 Now, let's **count down from 9**. Change the line `show number(i + 2, 150)` to `show number(9 - i, 150)`.
 
 ```blocks

docs/lessons/loops.md

@@ -1,6 +1,6 @@
 # blocks - loops
 
-An introduction to Loops for the Block Editor. #docs
+An introduction to Loops for the Block Editor.
 
 We may want to handle the user’s input multiple times or remain waiting for their input for a long time. We use loops to make sure that our code runs multiple times. These can be found in the **Loops** drawer.
 

docs/lessons/love-meter.md

@@ -1,8 +1,6 @@
 # love meter blocks lesson
 
-create a love meter with the BBC micro:bit.
-
-### @video td/videos/love-meter-0
+Create a love meter with the BBC micro:bit.
 
 ## Topic
 

docs/lessons/love-meter/activity.md

@@ -4,8 +4,6 @@ Create a love meter with the micro:bit
 
 ### ~avatar avatar
 
-### @video td/videos/love-meter-0
-
 Welcome! This activity will help you create a love meter with the micro:bit. Let's get started!
 
 ### ~

docs/lessons/love-meter/challenges.md

@@ -45,8 +45,6 @@ input.onPinPressed(TouchPin.P0, () => {
 
 ### Challenge 3
 
-### @video td/videos/love-meter-3
-
 **If** the rating is between 4 and 7, display the text "MEDIOCRE!" **else** display the text "MATCHED!"
 
 ```blocks

docs/lessons/lucky-7.md

@@ -1,8 +1,6 @@
 # lucky 7 blocks lesson
 
-show a number on the LED screen.
-
-### @video td/videos/lucky-7-0
+Show a number on the LED screen.
 
 ## Topic
 

docs/lessons/lucky-7/activity.md

@@ -4,8 +4,6 @@ Show a number on the LED screen.
 
 ### ~avatar avatar
 
-### @video td/videos/lucky-7-0
-
 Let's learn how to show the lucky number 7 on the LED screen.
 
 ### ~

docs/lessons/lucky-7/challenges.md

@@ -21,8 +21,6 @@ basic.pause(500)
 
 ### Challenge 2
 
-### @video td/videos/lucky-7-1-2
-
 What about other multiples of 7? Let's display the next multiple of 7 on the screen!
 
 ```blocks

docs/lessons/lucky-7/tutorial.md

@@ -0,0 +1,31 @@
+# lucky 7 blocks challenges
+
+Coding challenges for lucky 7.
+
+###~ Avatar
+
+### @video td/videos/lucky-7-1-2
+
+### Rebuild the game!
+
+The blocks have been shuffled! Put them back together so that…
+* The blocks should be multiples of 7 and a pause between the numbers
+
+```shuffle
+basic.showNumber(7)
+basic.pause(500)
+basic.showNumber(14)
+```
+
+### Hints and tips
+
+Cut out these documentation cards to help you!
+
+```cards
+basic.showNumber()
+basic.pause()
+```
+
+* Run the code to see if it works as expected.
+
+

docs/lessons/magic-logo.md

@@ -2,7 +2,7 @@
 
 show an image that points up when the logo is up.
 
-### @video td/videos/magic-logo-0
+
 
 ## Topic
 

docs/lessons/magic-logo/activity.md

@@ -4,8 +4,6 @@ Show an image that points up when the logo is up.
 
 ### ~avatar avatar
 
-### @video td/videos/magic-logo-0
-
 Welcome! This tutorial will help you display an arrow pointing toward the logo! Let's get started.
 
 ### ~

docs/lessons/magic-logo/challenges.md

@@ -24,8 +24,6 @@ input.onLogoUp(() => {
 
 How about when the logo is down? We should display an arrow pointing downward!
 
-### @video td/videos/magic-logo-1-2
-
 ```blocks
 input.onLogoUp(() => {
     basic.showLeds(`

docs/lessons/night-light.md

@@ -2,8 +2,6 @@
 
 change the brightness of the BBC micro:bit.
 
-### @video td/videos/night-light-0
-
 ## Topic
 
 Set Brightness

docs/lessons/night-light/activity.md

@@ -4,8 +4,6 @@ Change the brightness of the micro:bit.
 
 ### ~avatar avatar
 
-### @video td/videos/night-light-0
-
 Welcome! This tutorial will teach you how to change the brightness of the micro:bit. Let's get started!
 
 ### ~

docs/lessons/night-light/challenges.md

@@ -23,7 +23,7 @@ input.onButtonPressed(Button.A, () => {
 ```
 ### Challenge 1
 
-### @video td/videos/night-light-2
+
 
 What if we want to turn off all the LEDs? Let's do this by setting the brightness to `0` when button `B` is pressed. Add an event handler with `on button pressed(B)` add `set brightness(0)` to turn off the LEDs.
 

docs/lessons/night-light/offset-image/activity.md

@@ -1,6 +1,6 @@
 # offset image challenges
 
-Coding challenges for the offset image tutorial. #docs
+Coding challenges for the offset image tutorial.
 
 ## Before we get started
 
@@ -55,7 +55,7 @@ input.onButtonPressed(Button.B, () => {
 
 ### Challenge 2
 
-### @video td/videos/offset-image-2
+
 
 Now we want to make sure that the button does not go off the screen to the right. Add a new line that checks to see if offset = 5 after button `A` is pressed.
 

docs/lessons/prank-wifi.md

@@ -1,8 +1,6 @@
 # prank wifi lesson
 
-create a fake wifi app to trick your friends.
-
-create a fake wifi app to trick your friends
+Create a fake wifi app to trick your friends
 
 * [activity](/lessons/prank-wifi/activity)
 * [quiz](/lessons/prank-wifi/quiz)

docs/lessons/prank-wifi/activity.md

@@ -1,6 +1,6 @@
 # prank wifi challenges
 
-create a fake wifi app to trick your friends. #docs
+create a fake wifi app to trick your friends.
 
 ## Before we get started
 

docs/lessons/rock-paper-scissors.md

@@ -1,8 +1,6 @@
 # rock paper scissors lesson
 
-a game against the BBC micro:bit.
-
-### @video td/videos/rock-paper-scissors-0
+A game against the BBC micro:bit.
 
 ## Topic
 

docs/lessons/rock-paper-scissors/activity.md

@@ -4,7 +4,7 @@ A classic game against the micro:bit.
 
 ### ~avatar avatar
 
-### @video td/videos/rock-paper-scissors-0
+
 
 Welcome! This tutorial will help you create a game of rock paper scissors with the micro:bit. Let's get started!
 

docs/lessons/rotation-animation.md

@@ -20,6 +20,7 @@ Learn how to create images that look like a rotating animation by using a while
 ## Documentation
 
 ```cards
+while (true) {}
 let x = 0
 input.onButtonPressed(Button.A, () => {})
 basic.showLeds(`
@@ -30,7 +31,6 @@ basic.showLeds(`
     . . . . .
     `)
 basic.pause(100)
-while (true) {}
 ```
 
 ## Objectives

docs/lessons/rotation-animation/challenges.md

@@ -93,7 +93,7 @@ input.onButtonPressed(Button.A, () => {
 
 ### Challenge 2
 
-### @video td/videos/rotation-animation-1-and-2
+
 
 Now that we have the on button pressed condition, let's make the animation stop rotating by setting the rotating global variable to false when button `A` is pressed.
 

docs/lessons/screen-wipe.md

@@ -1,8 +1,6 @@
 # screen wipe blocks lesson
 
-clear the screen by pressing button "A".
-
-### @video td/videos/screen-wipe-0
+Clear the screen by pressing button "A".
 
 ## Topic
 

docs/lessons/screen-wipe/activity.md

@@ -4,7 +4,7 @@ Clear the screen by pressing buttons on the micro:bit
 
 ### ~avatar avatar
 
-### @video td/videos/screen-wipe-0
+
 
 This activity will teach how to clear the screen by pressing button A on the micro:bit.
 

docs/lessons/screen-wipe/challenges.md

@@ -4,7 +4,7 @@ Coding challenges for screen wipe.
 
 ## Before we get started
 
-Complete the [screen wipe](/lessons/screen-wipe) activity and your code will look like this:
+Complete the [screen wipe](/lessons/screen-wipe/activity) activity and your code will look like this:
 
 ```blocks
 basic.showLeds(`
@@ -85,7 +85,7 @@ input.onButtonPressed(Button.B, () => {
 
 ### Challenge 2
 
-### @video td/videos/screen-wipe-2
+
 
 Replay the animation when the "B" button is pressed placing the `show LEDs` block on the canvas.
 

docs/lessons/seismograph.md

@@ -9,7 +9,7 @@ Acceleration & Analog Read Pin
 ## Quick Links
 
 * [activity](/lessons/seismograph/activity)
-* [challenge](/lessons/seismograph/challenges)
+* [challenge](/lessons/seismograph/challenge)
 
 ## Prior learning/place of lesson in scheme of work 
 
@@ -18,11 +18,12 @@ Learn how to **show LEDs** to turn on a LED light pattern on the LED screen. We
 ## Documentation
 
 ```cards
-basic.forever(() => {
-});
-led.plotBarGraph(input.acceleration(Dimension.Strength) - 1023, 0);
-led.plotBarGraph(pins.analogReadPin(AnalogPin.P0), 0);
-
+basic.forever(() => {});
+radio.sendNumber(0);
+input.acceleration(Dimension.Strength)
+radio.onDataReceived(() => {});
+led.plotBarGraph(0, 0);
+radio.receiveNumber();
 ```
 
 ## Objectives

docs/lessons/seismograph/activity.md

@@ -1,53 +1,56 @@
 # Seismograph Activity 
 
+Welcome! In this project, you will build your own seismograph. This activity will teach how to use the micro:bit to chart the strength of the acceleration. Let's get started! Project duration: 25 minutes.
+
 ### ~avatar avatar
 
-In this project, you will build your own seismograph. 
+Engineering: In this project, you will build your own seismograph micro:bit from tape and a household plate. 
+
+### ~
 
 ## What you'll need: 
 
-* micro:bit 
-* USB cable
+* BBC micro:bit 
+* micro USB cable
+* Plate 
+* Tape 
 * Scissors
-* Glue gun
-* String
-* Cup (Plastic or Paper)
-* Magnet
 
-Welcome! This activity will teach how to use the micro:bit to chart the strength of the acceleration. Let's get started!
+![](/static/mb/lessons/seismograph11.png)
 
-1. Setup Cup: Use scissors to cut a usable window on the cup, which will be a square sized hole at the lid side of the cup. Use scissors to create a small hole in the center of the base of the cup. 
+# Engineering Steps
 
-2. Fasten Magnet: Fasten end of the string to the magnet with glue
+## 1. 
 
-3. Secure String: Fasten string to base of the cup and hang the remaining string outside the base of the cup. 
+Prepare Tape: Measure and cut approximately 10mm of tape. The tape will be fastened to a micro USB cable.  
+
+![](/static/mb/lessons/seismograph1.png)
+
+## 2. 
+
+Fasten Tape: Fasten tape to the micro USB cable and to the plate. Attach the micro:bit to the micro:bit USB cable. 
+
+![](/static/mb/lessons/seismograph0.png)
 
 ### ~avatar avatar
 
-Seismograph built, let's code! 
+Computer Science: The seismograph has been built. We are ready to program the micro:bit to be a seismograph! 
 
 ### ~
 
-4. Go to Codemicrobit.com
-
-    Click or tap Create Code
-    Click or tap Block Editor
+# Programming Steps
     
-### ~
+## 3. 
 
-5. 
-
-We will measure `acceleration (mg)` in terms of strength. Get the acceleration value (milli g-force), as measured in strength.
+We will measure `acceleration (mg)` in terms of strength or Magnitude.
 
 ```blocks
 input.acceleration(Dimension.Strength);
 ```
 
-### ~
+## 4. 
 
-6. 
-
-Use the plot bar chart to visualize the acceleration on the LED screen of the micro:bit in the specified range. You implement plot Bar Graph to display a vertical bar graph based on the "value" and "high" value. Then you must insert acceleration in based on strength. 
+Use the plot bar chart to visualize the acceleration on the LED screen. Use a forever to keep reading the acceleration value and displaying it on the screen.
 
 ```blocks
 basic.forever(() => {
@@ -56,11 +59,9 @@ basic.forever(() => {
 
 ```
 
-### ~
+## 6. 
 
-7. 
-
-Finally, we subtract the gravity from acceleration strength. 
+At rest, the micro:bit is always subject to Earth gravity, whose magnitude is measured around ``1023``. Substract ``1023`` to measure a data close to ``0``. 
 
 ```blocks
 basic.forever(() => {
@@ -71,76 +72,113 @@ basic.forever(() => {
 
 ### ~
 
-8. 
-
-Notice that making vibrating the object below the micro:bit changes the values and the line appears as a wave to display the value of the strength as measured in milli-gravities. By making the object below the micro:bit vibrate, you will observe changing values of the micro:bit. Also, the LEDs shown on the Bar Graph fluctates based on the movement of the micro:bit strength. 
-
-NOTE: The black color reflects the micro:bit device. 
-
-![](/static/mb/data4.png)
+### ~avatar avatar
 
+Data Analysis: We now need to use the micro:bit to Analyze Data and chart for the strength of the acceleration.
 
 ### ~
 
-9. 
+# Data Analysis Steps
+
+## 7. 
+
+First, notice that moving the micro:bit in the simulator in any direction, you will change the acceleration value, which is being displayed as the same color as the micro:bit simulator. Also, notice that by moving the micro:bit simulator, there is a changing acceleration value. Second, the flat colored horizontal line will start a waving line to display the value of the strength as measured in milli-gravities. Finally, notice that the LED display will fluctate based on the movement of the micro:bit simulator. 
+
+![](/static/mb/lessons/analyze20.png)
+
+## 8. 
  
-Vigorously move the micro:bit in the micro:bit simulatator by moving the micro:bit image from side to side. Every time the micro:bit moves in the x direction in the simulator,  you are generating data points that can be reviewed in Excel. The more attempts to move the micro:bit from side to side, the more data being saved in Excel. After you have vigarously moved the micro:bit simulator from side to side for a sufficient amount of time, you are ready to graph or chart the accceleration of the micro:bit. We want a printout of our acceleration on Excel that can be graphed in Excel. 
+Connect a micro:bit to your computer using your USB cable
+
+![](/static/mb/lessons/seismograph33.png)
+
+Click or tap the compile button for the seismograph program to run the program on the micro:bit. 
+
+![](/static/mb/lessons/seismograph22.png)
+
+## 9. 
+
+A black line should appear directly beneath the colored line. The black line measures the micro:bit acceleration.  And the colored line measures micro:bit simulator acceleration. 
+
+Run the acceleration experiment by vigarously moving the plate in any direction or move the object below the micro:bit (such as a table).
+
+Every time the micro:bit moves in any direction,  you generate data points that can be reviewed in Excel later. The more attempts to move the micro:bit, the more data to be reviewed in Excel.  
+
+![](/static/mb/lessons/seismograph5.png)
+
+## 10. 
+
+Please find seismogrph experiment obervations: 
+
+First, notice that moving the micro:bit in any direction, you will change the acceleration value, which is being displayed as a milli-gravities value. By moving the micro:bit, there will be a changing acceleration value. 
+
+![](/static/mb/lessons/seismograph7.png)
+
+Second, the horizontal line will move to plot the value of the strength as measured in milli-gravities. The horizontal line's movement is based on the micro:bit acceleration in Magnitude or Strength. 
+
+![](/static/mb/lessons/seismograph6.png)
+
+Third, notice that the LED display fluctates based on the movement of the micro:bit. 
+
+![](/static/mb/lessons/seismograph8.png)
+
+Now we are ready to graph or chart the accceleration of the micro:bit. We want a printout of the micro:bit acceleration graphed in Excel.
+
+## 11. 
+
+In order to receive the the data plotted by Excel, click or tap anywhere in the on the chart data.
+
+![](/static/mb/analyze1.png)
+  
+## 12. 
+
+You have two options to Analyze Data: 
+
+* Local File: Save the data to your local Downloads folder and open it in Excel. 
+* Stream to Cloud: Upload your data to Microsoft Azure to analyze it. 
+
+Click or tap Download data
+
+![](/static/mb/lessons/seismograph9.png)
+
+## 13. 
+
+A CSV file will be generated to display the data points collected by the micro:bit. Click or tap on the data Excel file that was downloaded to your local Downloads Folder. 
+
+![](/static/mb/lessons/analyze9.png)
+
+## 14.
+
+Select the data that you want to include in your chart. The chart should include the first two columns: time and acceleration. 
+
+Click or tap on the first two columns (A, B) to include time and acceleration data from the micro:bit  
 
 
-### ~
+## 15.
 
-10. 
+Click or tap on Insert then select Recommended Charts. We can select a chart that’s just right for the data.
 
-We want to chart the data collected by using a tool in Excel. 
+![](/static/mb/analyze3.png)
 
-The final part of this experiment is opening and reviewing the data in the Excel CSV file. Simply click on the line beneath the simulator. A CSV file will be generated to display the data points collected by moving the micro:bit in the X direction. Then click or tap on the data Excel file that was downloaded to your local Downloads Folder. 
+On the Recommended Charts tab, scroll through the list of chart types that Excel recommends for your data. 
 
+We want to select the chart called Line. A line chart is used to display trends over time. We will use the line chart because there are many data points over time. 
 
-### ~
+Click on the chart type to see how your data will look in that format. When you find the chart type that you want, click it, and then click OK. 
 
-10. 
+![](/static/mb/lessons/analyze16.png)
 
+Tip: If you don’t see the line chart, click the All Charts tab to see the line chart.
 
-First, click or tap on the first two columns (A, B) to  include the time of the data being collected; b) the results of acceleration data on the micro:bit  
+## 16. 
 
-![](/static/mb/data7.png)
+Use the Chart Elements, Chart Styles, and Chart Filters buttons next to the upper-right corner of the chart to add chart elements like axis titles or data labels, to customize the look of your chart
 
-Use the Recommended Charts command on the Insert tab to quickly create a chart that’s just right for your data.
+Alternatively, click or tap on the Design Ribbon. 
 
-* Select the data that you want to include in your chart.
+Let's select Style 10 as an example. 
 
-* Click Insert > Recommended Charts.
-
-### ~
-
-11. 
-
-
-![](/static/mb/chart1.png)
-
-* On the Recommended Charts tab, scroll through the list of chart types that Excel recommends for your data.
-
-Click any chart type to see how your data will look in that format. 
-
-When you find the chart type that you want, click it, and then click OK. We want to select the chart called Line. A line chart is used to display trends over time. We will use the line chart because there are many data points over time. 
-
-Tip: If you don’t see a chart type that you want, click the All Charts tab to see all of the available chart types.
-
-### ~
-
-12. 
-
-![](/static/mb/chart_title.png)
-
-* Use the Chart Elements, Chart Styles, and Chart Filters buttons next to the upper-right corner of the chart to add chart elements like axis titles or data labels, to customize the look of your chart
-
-### ~
-
-13. 
-
-![](/static/mb/elements_styles_filters.png)
-
-* Connect a micro:bit to your computer using your USB cable; compile; and repeat this experiment by vibrating the micro:bit. Then chart the data on Excel. 
+![](/static/mb/lessons/analyze19.png)
 
 ### ~avatar avatar
 

docs/lessons/seismograph/challenge.md

@@ -1,94 +1,198 @@
-# Challenge 
+# Seismograph Challenge 
 
-### ~avatar avatar 
+Coding challenges for the seismograph. 
 
-Welcome! The activity will teach you how to use the acceleration of the 1st micro:bit and to visualize the acceleration on the 2nd micro:bit. Let's get started!
+
+### ~avatar avatar
+
+Engineering: In this project, you will build a remote control based on the seismograph micro:bit activity using a second micro:bit and micro USB cable. 
 
 ### ~
-Let's measure `acceleration (mg)` and then `send number`. `Acceleration` is measured in **milli-gravities**, so a value of -1000 is equivalent to -1g or -9.81m/s^2. We will be able to get the acceleration value (g-force), in the specified "x" dimension. `Send number` will broadcast a number data packet to other micro:bits connected via radio.
 
-```blocks
-radio.sendNumber(input.acceleration(Dimension.X));
-```
-### ~
-We want to display the acceleration forever. In order to do so, we need a `forever` loop. A forever loop will repeat code in the background forever.
+## What you'll need: 
+
+* BBC micro:bits (2)
+* micro USB cables (2) 
+* Plate 
+* Tape 
+* Scissors
+
+![](/static/mb/lessons/seis_challenge01.png)
+
+## Before we get started
+
+Complete the [seismograph](/lessons/seismograph/activity) activity and your code will look like this:
 
 ```blocks
 basic.forever(() => {
-    radio.sendNumber(input.acceleration(Dimension.X));
+    led.plotBarGraph(input.acceleration(Dimension.Strength) - 1023, 0);
 });
 
+```
+
+### ~avatar avatar 
+Computer Science: Welcome! The activity will teach you how to code the acceleration of the 1st micro:bit and to visualize the acceleration on the 2nd micro:bit. Let's get started!
+### ~
+
+# Computer Science Steps
+
+## 1.
+We want to simply detach the blocks from the recent activity. We will use blocks from the activity to create a brand new program to show the way micro:bit devices communicate through the BLE (Bluetooth low energy) radio. 
+
+```shuffle
+basic.forever(() => {
+    led.plotBarGraph(input.acceleration(Dimension.Strength) - 1023, 0);
+});
 
 ```
-### ~
-We want to register code to run when a packet is received over radio. We can implement this code by adding `on data received`.
+
+## 2. 
+Let's measure `acceleration (mg)` and then `send number`. `Acceleration` is measured in **milli-gravities**, so a value of -1000 is equivalent to -1g or -9.81m/s^2. We will be able to get the acceleration value (g-force), in the specified "x" dimension. `Send number` will broadcast a number data packet to other micro:bits connected via radio.
+
+We need add send number block found in the Radio drawer. We will attach send number to acceleration and subtract the gravity from acceleration strength.  
+
+Your finished code will look like this:
+
+```blocks
+radio.sendNumber(input.acceleration(Dimension.Strength) - 1023);
+```
+
+## 3. 
+We want to display the acceleration forever. In order to do so, we need a `forever` loop. A forever loop will repeat code in the background forever. We need attach forever loop to send number. 
+
+Your finished code will look like this:
 
 ```blocks
 basic.forever(() => {
-    radio.sendNumber(input.acceleration(Dimension.X))
-})
-radio.onDataReceived(() => {
-    
-})
+    radio.sendNumber(input.acceleration(Dimension.Strength) - 1023);
+});
+
 ```
-### ~
+
+## 4. 
+We want to register code to run when a packet is received over radio. We can implement this code by adding `on data received`block found in the radio drawer.
+
+Your finished code will look like this:
+
+```blocks
+basic.forever(() => {
+    radio.sendNumber(input.acceleration(Dimension.Strength) - 1023);
+});
+radio.onDataReceived(() => {
+});
+
+```
+
+## 5. 
 Finally, we want to chart the acceleration. So we must first implement `plot bar graph`. `Plot Bar Graph` will display a vertical bar graph based on the value and high value. In order to transfer the receive the number from the 1st micro:bit, we must implement `receive number` to constantly display a vertical bar graph based on the value. Remember, the value will equal to the micro:bit's acceleration in the "x" direction.
 
+Your finished code will look like this:
+
 ```blocks
 basic.forever(() => {
-    radio.sendNumber(input.acceleration(Dimension.X))
-})
+    radio.sendNumber(input.acceleration(Dimension.Strength) - 1023);
+});
 radio.onDataReceived(() => {
-    led.plotBarGraph(radio.receiveNumber(), 1023)
-})
-
+    led.plotBarGraph(radio.receiveNumber(), 0);
+});
 ```
-### ~
-Notice that moving the micro:bit the farthest direction in the x direction will be -1023 on the charting beneath the simulator. The second observation will be that the LEDs will be full brightness on the 2nd micro:bit. There is a single LED turned on with the 1st micro:bit. Additionally, the graphs will reflect 0 acceleation for the 1st micro:bit. In this scenario, if you are adjusting the acceleration in the simualator, you are also changing your chart that will be produced.  
-
-![](/static/mb/acc.png)
 
+### ~avatar avatar 
+Science: Welcome! The activity will teach you how to chart the acceleration of the 1st micro:bit and to visualize the acceleration on the 2nd micro:bit. Let's get started!
 ### ~
-NOTE: The colors of the charts reflect the color of the micro:bit simulator. In this instance, the micro:bits are blue and green. So the colors of the line graphs reflect the colors of the micro:bit
+
+# Science Steps
+
+## 6. 
+First, notice that moving the 1st micro:bit in the simulator in any direction, you will change the acceleration value of the 2nd micro:bit. Also, notice that by moving the micro:bit simulator, there is a changing acceleration value of the second micro:bit. Second, the flat colored horizontal line will start a waving line on the 2nd micro:bit to display the value of the strength as measured in milli-gravities. Finally, notice that the LED display will fluctate based on the movement of the 2nd micro:bit simulator.
+
+![](/static/mb//lessons/seis_challenge02.png)
+
+## 7. 
  
- ### ~
-After running this simulatation several seconds by moving the micro:bit side to side in the x direction, you are ready to graph or chart the accceleration of the micro:bit.  We want a printout of our acceleration on Excel. We will graph the fluctuating acceleration of the simulation experiment. 
+Connect the 2nd micro:bit to your computer using your USB cable. We should have two micro:bit devices attached to the computer. 
+
+![](/static/mb/lessons/seismograph33.png)
+
+## 8.
+
+Click or tap the compile button for the seismograph program to run the program on the 1st micro:bit and 2nd micro:bit.
+
+## 9. 
+
+The black lines should appear directly beneath the colored lines. The black lines measure the micro:bit acceleration. And the colored lines measures micro:bit simulator acceleration.
+
+![](/static/mb/lessons/seis_challenge05.png)
+
+Run the acceleration experiment by vigarously moving the plate in any direction or move the object below the micro:bit (such as a table).
+
+![](/static/mb/lessons/seis_challenge06.png)
+
+Every time the micro:bit moves in any direction, you generate data points that can be reviewed in Excel later. The more attempts to move the micro:bit, the more data to be reviewed in Excel. Notice that the LED on the 2nd micro:bit changes to communicate the movement of the 1st micro:bit.
+
+![](/static/mb/lessons/seis_challenge04.png)
+
+Now we are ready to graph or chart the accceleration of the micro:bit. We want a printout of the micro:bit acceleration graphed in Excel.
+
+## 10. 
+
+In order to receive the the data plotted by Excel, click or tap anywhere in the on the chart data.
+
+![](/static/mb/lessons/seis_challenge07.png)
+
+## 11. 
+
+You have two options to Analyze Data: 
+
+* Local File: Save the data to your local Downloads folder and open it in Excel. 
+* Stream to Cloud: Upload your data to Microsoft Azure to analyze it. 
+
+Click or tap Download data
+
+![](/static/mb/lessons/seismograph9.png)
+
+## 12. 
+
+A CSV file will be generated to display the data points collected by the micro:bit. Click or tap on the data Excel file that was downloaded to your local Downloads Folder. 
+
+![](/static/mb/lessons/analyze9.png)
+
+## 13.
+
+Select the data that you want to include in your chart. The chart should include the first two columns: time and acceleration. 
+
+Click or tap on the first two columns (A, B) to include time and acceleration data from the micro:bit. We only need the first two columns (A, B) because the 2nd micro:bit changes have been communicated by the 1st micro:bit. So the data points of the seismograph are being recorded on the 1st micro:bit. 
+
+## 14.
+
+Click or tap on Insert then select Recommended Charts. We can select a chart that’s just right for the data.
+
+![](/static/mb/analyze3.png)
+
+On the Recommended Charts tab, scroll through the list of chart types that Excel recommends for your data. 
+
+We want to select the chart called Line. A line chart is used to display trends over time. We will use the line chart because there are many data points over time. 
+
+Click on the chart type to see how your data will look in that format. When you find the chart type that you want, click it, and then click OK. 
+
+![](/static/mb/lessons/analyze16.png)
+
+Tip: If you don’t see the line chart, click the All Charts tab to see the line chart.
+
+## 15. 
+
+Use the Chart Elements, Chart Styles, and Chart Filters buttons next to the upper-right corner of the chart to add chart elements like axis titles or data labels, to customize the look of your chart
+
+Alternatively, click or tap on the Design Ribbon. 
+
+Let's select Style 10 as an example. 
+
+![](/static/mb/lessons/analyze19.png)
 
-![](/static/mb/acc2.png)
 
 ### ~
-Finally, you must open the Excel CSV file by clicking on the data.xls file that was downloaded to Downloads Folder. 
-
-![](/static/mb/data3.png)
-
-Use the Recommended Charts command on the Insert tab to quickly create a chart that’s just right for your data.
-
-* Select the data that you want to include in your chart.
-
-* Click Insert > Recommended Charts.
-
-![](/static/mb/chart1.png)
-
-* On the Recommended Charts tab, scroll through the list of chart types that Excel recommends for your data.
-
-Click any chart type to see how your data will look in that format. 
-
-When you find the chart type that you want, click it, and then click OK. We want to select the chart called Line. A line chart is used to display trends over time. We will use the line chart because there are many data points over time. 
-
-Tip: If you don’t see a chart type that you want, click the All Charts tab to see all of the available chart types.
-
-![](/static/mb/chart_title.png)
-
-* Use the Chart Elements, Chart Styles, and Chart Filters buttons next to the upper-right corner of the chart to add chart elements like axis titles or data labels, to customize the look of your chart
-
-![](/static/mb/elements_styles_filters.png)
-
-### ~
-Have fun reviewing your simulation and analyze the acceleration by chart the Excel data using Excel.
-
-* Connect the first micro:bit to your computer using your USB cable and run the charting script on it.
-* Connect the second micro:bit to your computer using your USB cable and run the charting script on it.
-* The first person and second person take turns tilting the micro:bit in the "x" direction while the other player charts the data on the micro:bit!
+* Have fun reviewing your seismograph data and analyzing the acceleration with Excel.
+* The first person and second person take shaking or moving the micor:bit in any direction while the other player charts the data on the micro:bit!
 * Review and analyze the actual micro:bit device acceleration data on Excel
-* Display acceleration with y or z using plot bar graph by changing acceleration from "x" to "y" or "z" 
+
 

docs/lessons/smiley.md

@@ -1,8 +1,6 @@
 # smiley blocks lesson 
 
-design a blinking image lesson #docs
-
-### @video td/videos/smiley-0
+Design a blinking image lesson
 
 ## Topic 
 

docs/lessons/smiley/activity.md

@@ -4,7 +4,7 @@ Learn to design a blinking image.
 
 ### ~avatar avatar
 
-### @video td/videos/smiley-0
+
 
 Welcome! This tutorial will help you make a smiley face blink. Let's get started!
 

docs/lessons/smiley/challenges.md

@@ -54,7 +54,7 @@ input.onButtonPressed(Button.A, () => {
 
 ### Challenge 2
 
-### @video td/videos/smiley-2
+
 
 Now, we want to show a frowny face when this button is pressed. Let's show the LEDs.
 

docs/lessons/snowflake-fall.md

@@ -2,7 +2,7 @@
 
 design a blinking rectangle animation.
 
-### @video td/videos/snowflake-fall-0
+
 
 ## Topic
 
@@ -21,10 +21,6 @@ Learn how to show LEDs with a, `pause` to pause program execution for a specifie
 
 ## Documentation
 
-* **show LEDs** : [read more...](/reference/basic/show-leds)
-* **pause** : [read more...](/reference/basic/pause)
-* **forever** : [read more...](/reference/basic/forever)
-
 ```cards
 basic.showLeds(`
     . . . . .

docs/lessons/snowflake-fall/activity.md

@@ -4,7 +4,7 @@ design a blinking rectangle animation.
 
 ### ~avatar avatar
 
-### @video td/videos/snowflake-fall-0
+
 
 Welcome! This tutorial will teach how design a **snowfall animation**. Let's get started!
 

docs/lessons/snowflake-fall/challenges.md

@@ -27,7 +27,7 @@ basic.forever(() => {
 
 ### Challenge 1
 
-### @video td/videos/snowflake-fall-1
+
 
 To finalize our snowflake fall, let's add a different snowflake pattern.
 

docs/lessons/speed-button.md

@@ -2,7 +2,7 @@
 
 code a speed game by declaring Booleans on the BBC micro:bit.
 
-### @video td/videos/speed-button-3
+
 
 ## Topic
 

docs/lessons/speed-button/activity.md

@@ -1,6 +1,6 @@
 # speed button challenges
 
-Coding challenges for the speed button tutorial. #docs
+Coding challenges for the speed button tutorial.
 
 ## Before we get started
 
@@ -63,7 +63,7 @@ input.onButtonPressed(Button.A, () => {
 
 ### Challenge 3
 
-### @video td/videos/speed-button-3
+
 
 Now let's display if the user won or lost. To do so, we need to check the status of `fastPress` when the game is finished, and then show the correct message.
 
@@ -91,7 +91,7 @@ input.onButtonPressed(Button.A, () => {
 
 ### Challenge 4
 
-### @video td/videos/speed-button-4
+
 
 Modify the code to change the difficulty level. Increasing the time will make it easier, while decreasing the time will make it harder. For example, changing the 5000 milliseconds to 6000 milliseconds will make the difficulty easier.
 

docs/lessons/spinner.md

@@ -2,7 +2,7 @@
 
 a spin the BBC micro:bit game with the input on shake.
 
-### @video td/videos/spinner-0
+
 
 ## Topic
 
@@ -21,7 +21,6 @@ Learn how to use an if statement to run code run code depending on whether a con
 
 ## Documentation
 
-
 ```cards
 if (true) {}
 let x = 0

docs/lessons/spinner/activity.md

@@ -4,7 +4,7 @@ Create an arrow that randomly points to a player.
 
 ### ~avatar avatar
 
-### @video td/videos/spinner-0
+
 
 ### ~
 

docs/lessons/stem.md

@@ -41,7 +41,7 @@ Overview of Blocks lessons for the BBC micro:bit.
 * [The Watch](/lessons/the-watch), design and create The Watch
 * [Truth or dare](/lessons/truth-or-dare), a game that forces each player to reveal a secret or do something funny with if statement
 * [Spinner](/lessons/spinner), spin the arrow with multiple if statements
-* [Die roll](/lessons/die-roll), spin with more if statements
+* [Dice roll](/lessons/dice-roll), spin with more if statements
 * [Beatbox](/lessons/classic-beatbox), make a beatbox music player with variables
 * [Temperature](/lessons/temperature), get the ambient temperature (degree Celsius °C)
 

docs/lessons/strobe-light.md

@@ -2,7 +2,7 @@
 
 Learn how to create a blinking LED script.
 
-### @video td/videos/strobe-light-0
+
 
 ## Topic
 

docs/lessons/strobe-light/activity.md

@@ -4,7 +4,7 @@ Develop shapes with a for loop.
 
 ### ~avatar avatar
 
-### @video td/videos/strobe-light-0
+
 
 Welcome! This guided tutorial will teach how to develop shapes with a for loop. Let's get started!
 

docs/lessons/strobe-light/challenges.md

@@ -19,7 +19,7 @@ for (let i = 0; i < 5; i++) {
 
 ### Challenge 1
 
-### @video td/videos/strobe-light-1
+
 
 Make the LEDs light up faster by changing the **pause** from 200 to 100 milliseconds:
 
@@ -36,7 +36,7 @@ for (let i = 0; i < 5; i++) {
 
 ### Challenge 2
 
-### @video td/videos/strobe-light-2
+
 
 Make the board light up by rows instead of by columns by swapping the `i` and `j` variables in `plot(i, j)`.
 
@@ -53,7 +53,7 @@ for (let i = 0; i < 5; i++) {
 
 ### Challenge 3
 
-### @video td/videos/strobe-light-ultimate
+
 
 Now that all the LEDs are lit up, let's make them turn off by reversing the strobe light pattern! You can use `unplot` to turn off a single LED.
 

docs/lessons/teach.md

@@ -22,7 +22,7 @@ The lesson plan maps to the Progressions Pathways, Computing Curriculum, and Qui
 
 Expand your knowledge of programming with lots of great step-by-step activities. All the lessons come with instructions that will drive the students to a complete, functional code. These activities are very directive to make sure that students keep progressing. When the activities are over, additional challenges are given to advance code through printed instructions. An activity contains supporting videos as shown with the [blink activity](/lessons/blink/activity).
 
-### @video td/videos/blink-0
+
 
 3) Quiz
 

docs/lessons/telegraph.md

@@ -14,7 +14,8 @@ Telegraph
 
 ## Prior learning/place of lesson in scheme of work
 
-Learn how to convert your BBC micro:bit into a telegraph using a second BBC micro:bit as well as pin P1, P2, 3V, GND, and crocodile clips (or spring clips). The connect BBC micro:bit uses pins P1, P2, 3V, GND.
+Learn how to convert your BBC micro:bit into a telegraph using a second BBC micro:bit as well as pin P1, P2, 3V, GND, 
+and crocodile clips (or spring clips). The connect BBC micro:bit uses pins P1, P2, 3V, GND.
 
 ## Objectives
 

docs/lessons/truth-or-dare.md

@@ -2,7 +2,7 @@
 
 create a love meter with the BBC micro:bit.
 
-### @video td/videos/truth-or-dare-0
+
 
 ## Topic
 

docs/lessons/truth-or-dare/activity.md

@@ -4,7 +4,7 @@ A multi-player game that forces each player to reveal a secret or something funn
 
 ### ~avatar avatar
 
-### @video td/videos/truth-or-dare-0
+
 
 Welcome! This tutorial will teach how to program a game of truth or dare on the micro:bit. Let's get started!