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Miscellaneous changes. (#475)

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* Miscellaneous changes.

Replaced images with hand-drawn, added cover photos, corrected wording
in rubric.

* Small edits to 'Iteration' changes.
This commit is contained in:
dkiang
2017-08-01 05:49:18 -07:00
committed by Peli de Halleux
parent 531c77d9de
commit 102dfcc32a
12 changed files with 16 additions and 8 deletions
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docs/courses/csintro/iteration.md
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# Iteration & Looping
![Guitar Picture](/static/courses/csintro/iteration/guitar.jpg)
This lesson introduces the concept of looping and iteration. Presents the 'While' block as a combination of an iteration and a conditional statement.
## Lesson objectives

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docs/courses/csintro/iteration/activity.md
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* Click on the snail icon under the micro:bit simulator.
This will slow down the execution (running) of the program, and highlight parts of your code so you can see step-by-step, which line of code is being processed.
![micro:bit sim in slo-mo](/static/courses/csintro/iteration/microbit-slo-mo.png)
![micro:bit sim in slo-mo](/static/courses/csintro/iteration/slo-mo.gif)
Now run your program several more times. Do you see the different lines of your code highlighted as the program runs? Do you see the sprite move?
@@ -189,6 +189,8 @@ We can use the default values for the rest of the parameters.
You should now see a light moving from left to right along the top row of the micro:bit simulator.
![Moving Dot Top Row](/static/courses/csintro/iteration/moving-dot.gif)
To make our pattern continue through all the leds, we can change the value of the y coordinate as well.
To do this efficiently, using the fewest lines of code, we can even put a loop inside a loop. Loops inside other loops are known as **nested loops**.
@@ -216,6 +218,8 @@ basic.forever(() => {
There! With only a half dozen or so lines of code, we have made our light travel through all the coordinates on the micro:bit screen.
![Moving Dot All](/static/courses/csintro/iteration/moving-dot-all.gif)
**Check:** Make sure the students can read this code.
Here is what is happening to the values of the x & y coordinates as the program steps through each line and loop inside the forever block:

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docs/courses/csintro/iteration/project.md
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# Project: Get loopy!
![Birthday Card Project](/static/courses/csintro/iteration/birthday-card.jpg)
There are many different ways to use the three types of loop blocks.
Recall the different common repetitive actions you thought of back at the beginning of this lesson.
@@ -26,7 +28,7 @@ https://youtu.be/Xvybu_T5IL8
[**micro:bit Hat Man - inside view**](https://youtu.be/ZfKgFQjygQQ)
https://youtu.be/ZfKgFQjygQQ
<br/>
This project uses the micro:bit light sensor to display a happy face when it is sunny, and a frowning face when it is dark. The micro:bit is connected to a servo mounted on the inside of the container, and the smile and frown are attached to plastic coffee stirrers with tape and hot glue.
## Reflection
@@ -53,14 +55,14 @@ Have students write a reflection of about 150–300 words, addressing the follow
**4 =** All variable names are unique and clearly describe what information values the variables hold<br/>
**3 =** The majority of variable names are unique and clearly describe what information values the variables hold.<br/>
**2 =** A minority of variable names are unique and clearly describe what information values the variables hold.<br/>
**2 =** Few variable names are unique or clearly describe what information values the variables hold.<br/>
**1 =** None of the variable names clearly describe what information values the variables hold.
### Sound, display, and motion
**4 =** Uses sound, display, and motion in a way that is integral to the program.<br/>
**3 =** Uses a only two of the required element in a way that is integral to the program.<br/>
**2 =** Uses a only one of the required element in a way that is integral to the program.<br/>
**3 =** Uses only two of the required elements in a way that is integral to the program.<br/>
**2 =** Uses only one of the required elements in a way that is integral to the program.<br/>
**1 =** None of the required elements are used.
### micro:bit program

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docs/courses/csintro/iteration/unplugged.md
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# Unplugged: Walk a square
![Chair with Pseudocode on the board.](/static/courses/csintro/iteration/chair-pseudo.png)
## Objective
To reinforce the concept of iteration by having students act out the repeated steps of an algorithm in real life.
## Overview
Students will give the teacher instructions to do a simple activity, then look for places where using iteration could shorten their code and make it more efficient.
![Chair](/static/courses/csintro/iteration/chair.jpg)
## Process
* Place a chair in the front of the room.
@@ -41,7 +41,7 @@ This is a great opportunity to have the students think of the benefits of having
## Notes
* Depending on the particular class, you can make this exercise more challenging, by requiring the students to be more specific in their instructions.
For example: Step forward 14 inches (you can have students actually measure the exact distance), turn left 90 degrees...
**Example:** Step forward 14 inches (you can have students actually measure the exact distance), turn left 90 degrees...