diff --git a/docs/lessons.md b/docs/lessons.md
index cee6fa59..f59dbb51 100644
--- a/docs/lessons.md
+++ b/docs/lessons.md
@@ -5,9 +5,6 @@
 
 ### ~column 
 
-## O365 Integration
-* [Science Experiments: Chart](/lessons/charting), create an app for simulating and measuring sensor data of acceleration, temperature, light level, and rotation 
-
 ## Beginner
 
 * [Beautiful Image](/lessons/beautiful-image), show a beautiful image with show LEDs
@@ -60,6 +57,9 @@
 * [Telegraph](/lessons/telegraph), play the telegraph game between two BBC micro:bits
 * [Pogo](/lessons/pogo), create a pogo game to test your jumping abilities
 
+## Science
+* [Charting](/lessons/charting), measure and chart acceleration
+
 ## Advanced
 * [Prank WiFi](/lessons/prank-wifi), create fake WiFi to trick your friends
 * [Speed Button](/lessons/speed-button), code a speed game with running time
@@ -70,5 +70,4 @@
 
 ### @section full
 
-The lessons promote computational thinking and computer science literacy[ read more...](/lessons/teach)
-
+The lessons promote computational thinking and computer science literacy[ read more...](/lessons/teach)
\ No newline at end of file
diff --git a/docs/lessons/answering-machine/challenges.md b/docs/lessons/answering-machine/challenges.md
index 0c047f8d..5116e590 100644
--- a/docs/lessons/answering-machine/challenges.md
+++ b/docs/lessons/answering-machine/challenges.md
@@ -21,7 +21,6 @@ basic.showString("ASK ME A QUESTION")
 input.onButtonPressed(Button.A, () => {
     basic.showString("Yes")
 })
-
 ```
 
 * `Run` the code to see if it works as expected.
@@ -45,7 +44,6 @@ input.onButtonPressed(Button.B, () => {
 
 * `Run` the code to see if it works as expected.
 
-**Challenge 3**
-
-When you are asked a yes or no question, do you always say yes or no? Add a condition for `on shake` that displays `MAYBE`.
+### Challenge 3
 
+When you are asked a yes or no question, do you always say yes or no? Add a condition for `on shake` that displays `MAYBE`.
\ No newline at end of file
diff --git a/docs/lessons/answering-machine/quiz-answers.md b/docs/lessons/answering-machine/quiz-answers.md
index f37f04ae..eb89f62f 100644
--- a/docs/lessons/answering-machine/quiz-answers.md
+++ b/docs/lessons/answering-machine/quiz-answers.md
@@ -12,7 +12,6 @@ Answers may vary. This is a function that will show a string on the LED screen o
 
 ```blocks
 basic.showString("Y")
-
 ```
 
 ![](/static/mb/lessons/answering-machine-0.png)
@@ -22,7 +21,6 @@ basic.showString("Y")
 
 ```blocks
 basic.showString("Hi")
-
 ```
 
 ![](/static/mb/lessons/answering-machine-1.png)
@@ -35,7 +33,6 @@ basic.showString("Hi")
 
 ```blocks
 basic.showString("Z")
-
 ```
 
 
diff --git a/docs/lessons/classic-beatbox/challenges.md b/docs/lessons/classic-beatbox/challenges.md
index 97d7d8eb..03d081a2 100644
--- a/docs/lessons/classic-beatbox/challenges.md
+++ b/docs/lessons/classic-beatbox/challenges.md
@@ -17,7 +17,7 @@ input.onPinPressed(TouchPin.P1, () => {
 })
 ```
 
-**Challenge 1**
+### Challenge 1
 
 Let's include a second sound `on pin pressed` *P2*. To do this, you need to add the same blocks as the banana keyboard activity. However, you must change alter `on pin pressed` from P1 to P2. Additionally, you must *decrease* the frequency of the variable "sound" by 25. Modify your code so that your code looks like this
 
@@ -42,7 +42,7 @@ input.onPinPressed(TouchPin.P2, () => {
 
 * click *run* to see if the code works as expected.
 
-**Challenge 2**
+### Challenge 2
 
 Finally, we want images to be displayed with sounds `on pin pressed`. Add `show LEDs` blocks under `on pin pressed` P1 and P2.
 
diff --git a/docs/lessons/game-of-chance/challenges.md b/docs/lessons/game-of-chance/challenges.md
index d0d39033..891301e1 100644
--- a/docs/lessons/game-of-chance/challenges.md
+++ b/docs/lessons/game-of-chance/challenges.md
@@ -42,7 +42,7 @@ input.onButtonPressed(Button.B, () => {
 
 * `Run` the code to see if it works as expected.
 
-**Challenge 3**
+### Challenge 3
 
 When you are asked a yes or no question, do you always say yes or no? Add a condition for `on shake` that displays `TRY AGAIN`.
 
diff --git a/docs/lessons/glowing-pendulum/challenges.md b/docs/lessons/glowing-pendulum/challenges.md
index 5784a661..420e36cb 100644
--- a/docs/lessons/glowing-pendulum/challenges.md
+++ b/docs/lessons/glowing-pendulum/challenges.md
@@ -24,13 +24,13 @@ basic.forever(() => {
 
 ```
 
-**Challenge 1**
+### Challenge 1
 
 ![](/static/mb/lessons/glowing-pendulum-0.jpg)
 
 Hold the micro:bit in your hand in a dark room. Move the micro:bit like a pendulum and produce a slow image that captures the pattern of the micro:bit LEDs.
 
-**Challenge 2**
+### Challenge 2
 
 Replace "y" in `acceleration(y)` with "x" or "z". Changing the axis will cause the micro:bit to measure the force in a different direction. What differences in the resulting pattern does this replacement make?
 
diff --git a/docs/lessons/magic-8/challenges.md b/docs/lessons/magic-8/challenges.md
index be4d71a2..859e8efb 100644
--- a/docs/lessons/magic-8/challenges.md
+++ b/docs/lessons/magic-8/challenges.md
@@ -26,7 +26,7 @@ input.onGesture(Gesture.Shake, () =>  {
 ```
 
 
-**Challenge 1**
+### Challenge 1
 
 Now let's increase the number of responses the magic 8 ball can give. How about 5 responses instead? Let's change the limit of `pick random` to  4.
 
@@ -49,7 +49,7 @@ input.onGesture(Gesture.Shake, () =>  {
 })
 ```
 
-**Challenge 2**
+### Challenge 2
 
 Now have the magic 8 ball respond "Try again" if **randomNumber** is 3.
 
@@ -73,7 +73,7 @@ input.onGesture(Gesture.Shake, () => {
 })
 ```
 
-**Challenge 3**
+### Challenge 3
 
 Now what about if **randomNumber** is 4? Let's have the magic 8 ball respond "Definitely!".
 
diff --git a/docs/lessons/night-light/challenges.md b/docs/lessons/night-light/challenges.md
index 81917863..3187a914 100644
--- a/docs/lessons/night-light/challenges.md
+++ b/docs/lessons/night-light/challenges.md
@@ -46,7 +46,7 @@ input.onButtonPressed(Button.B, () => {
 ```
 
 
-**Challenge 3**
+### Challenge 3
 
 Add an event handler with `on shake` to change the LED brightness back to a `255`.
 
diff --git a/docs/lessons/offset-image/activity.md b/docs/lessons/offset-image/activity.md
index f2ce36f7..32a04179 100644
--- a/docs/lessons/offset-image/activity.md
+++ b/docs/lessons/offset-image/activity.md
@@ -88,7 +88,7 @@ input.onButtonPressed(Button.B, () => {
 
 * Run the code to see if it works as expected.
 
-**Challenge 3**
+### Challenge 3
 
 Now make sure the image does not go off the left side and if it does, prompt the user to push button `A`.
 
diff --git a/docs/lessons/prank-wifi/activity.md b/docs/lessons/prank-wifi/activity.md
index 6a5447ab..001a896d 100644
--- a/docs/lessons/prank-wifi/activity.md
+++ b/docs/lessons/prank-wifi/activity.md
@@ -42,7 +42,7 @@ basic.forever(() => {
 
 ```
 
-**Challenge 1**
+### Challenge 1
 
 What if wanted to show the maximum connectivity of wifi instead of just 1, 3, or 4 bars?
 
@@ -86,7 +86,7 @@ basic.forever(() => {
 })
 ```
 
-**Challenge 2**
+### Challenge 2
 
 Let's add an **IF** at the bottom of your code that checks to see if `sum >= to 1200` **and** if `sum <1400`
 
@@ -135,7 +135,7 @@ basic.forever(() => {
 })
 ```
 
-**Challenge 3**
+### Challenge 3
 
 Now it's your turn! Be creative and change the Wifi meter images to your own wifi image you're sure will prank your friends by editing the lines that call `showLeds()`.
 
diff --git a/docs/lessons/screen-wipe/challenges.md b/docs/lessons/screen-wipe/challenges.md
index 7e5252a7..80a4f291 100644
--- a/docs/lessons/screen-wipe/challenges.md
+++ b/docs/lessons/screen-wipe/challenges.md
@@ -41,7 +41,7 @@ input.onButtonPressed(Button.A, () => {
 
 ```
 
-**Challenge 1**
+### Challenge 1
 
 Create an event handler for Button B.
 
@@ -83,7 +83,7 @@ input.onButtonPressed(Button.B, () => {
 
 ```
 
-**Challenge 2**
+### Challenge 2
 
 ### @video td/videos/screen-wipe-2
 
@@ -155,7 +155,7 @@ basic.showLeds(`
 ```
 
 
-**Challenge 3**
+### Challenge 3
 
 Show an animation that scrolls back up when you press button "B".