put lessons back for Michael

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

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+# guess the number activity
+
+Guess the number with math random. 
+
+### ~avatar avatar
+
+Welcome! This tutorial will help you create a guess the number game! Let's get started!
+
+### ~
+
+Add an event handler when button `A` is pressed.
+
+
+```blocks
+input.onButtonPressed(Button.A, () => {
+})
+
+```
+
+Create a local variable of type number `x` and set it to a random number using `pick random`. `pick random` 9 generates a random number between `0` and `9`.
+
+```blocks
+input.onButtonPressed(Button.A, () => {
+    let x = Math.random(10)
+})
+
+```
+
+Show the random number on the screen.
+
+
+```blocks
+input.onButtonPressed(Button.A, () => {
+    let x = Math.random(10)
+    basic.showNumber(x)
+})
+
+```
+
+### ~avatar avatar
+
+Excellent, you're ready to continue with the [challenges](/lessons/guess-the-number/challenges)!
+
+### ~
+