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move lessons out of web site

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will move select lessons back to "educators" section
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Tom Ball
2016-06-14 11:49:58 -04:00
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docs/lessons/speed-button/activity.md
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# speed button challenges
Coding challenges for the speed button tutorial.
## Before we get started
Complete the following guided tutorial:
Your starting code should look like this:
```blocks
let counter = 0
let fastPress = false
input.onButtonPressed(Button.A, () => {
counter = counter + 1
})
```
### Challenge 1
We need to know when the user has hit button `A` 15 times. The user wins when he/she is able to accomplish this in less than 5000 milliseconds (5 seconds). We can check for both conditions by using an `and` operator. When using an `and` operator, both conditions need to be true in order for the condition to be true.
```blocks
let counter1 = 0
let fastPress1 = false
input.onButtonPressed(Button.A, () => {
counter1 = counter1 + 1
if (counter1 == 15 && input.runningTime() < 5000) {
}
})
```
Next, if the user has won, let's set our boolean to true. This indicates that he or she has won.
```blocks
let counter2 = 0
let fastPress2 = false
input.onButtonPressed(Button.A, () => {
counter2 = counter2 + 1
if (counter2 == 15 && input.runningTime() < 5000) {
fastPress2 = true // ***
}
})
```
### Challenge 2
We want to set `fastPress` to false if the user was too slow. To do so, we need another condition to see if the user took more than 5000 milliseconds (5 seconds). In the `if` statement, set `fastPress` to false.
```blocks
let counter3 = 0
let fastPress3 = false
input.onButtonPressed(Button.A, () => {
counter3 = counter3 + 1
if (counter3 == 15 && input.runningTime() < 5000) {
fastPress3 = true
}
if (counter3 == 15 && input.runningTime() > 4999) {
fastPress3 = false // ***
}
})
```
### Challenge 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.
```blocks
let counter4 = 0
let fastPress4 = false
input.onButtonPressed(Button.A, () => {
counter4 = counter4 + 1
if (counter4 == 15 && input.runningTime() < 5000) {
fastPress4 = true
}
if (counter4 == 15 && input.runningTime() > 4999) {
fastPress4 = false
}
if (counter4 == 15 && fastPress4) {
basic.showString("YOU WIN!", 150) // ***
}
if (counter4 == 15 && ! fastPress4) {
basic.showString("TOO SLOW!", 150) // ***
}
})
```
* Click the `run` button to see if the code runs properly.
### Challenge 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.

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docs/lessons/speed-button/quiz-answers.md
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# speed button quiz answers
counter that keeps track of how many times button "A" has been pressed.
This is the answer key for the [speed button quiz](/lessons/speed-button/quiz).
## 1. What is a variable?
<br/>
A variable that is available throughout your main function.
## 2. If the rectangle below represents the BBC micro:bit, shade the area that shows the value of the variable count.
```blocks
let count = 0
```
![](/static/mb/lessons/speed-button-0.png)
## 3. If the rectangle below represents the BBC micro:bit, shade the areas that will be displayed after two button presses on Button A. Explain why that particular area is shaded.
```blocks
let count_ = 0
input.onButtonPressed(Button.A, () => {
count_ = count_ + 1
basic.showNumber(count_, 100)
})
```
<br/>
![](/static/mb/lessons/speed-button-1.png)
After two button presses, **count** will be equal to 2.
## 5. If the rectangle below represents the BBC micro:bit, shade the areas that will be displayed after five button presses on Button A. Explain why that particular area is shaded.
```blocks
let count_ = 0
input.onButtonPressed(Button.A, () => {
count_ = count_ + 1
basic.showNumber(count_, 100)
})
```
![](/static/mb/lessons/speed-button-2.png)
After five button presses, **count** will be equal to 5.

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docs/lessons/speed-button/quiz.md
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# speed button quiz
counter that keeps track of how many times button "A" has been pressed.
## Name
## Directions
Use this activity document to guide your work in the [speed button tutorial](/lessons/speed-button/activity).
Answer the questions while completing the tutorial. Pay attention to the dialogues!
## 1. What is a variable?
## 2. Draw which LEDs show the number being stored as a global variable called count
```blocks
let count = 0
```
![](/static/mb/empty-microbit.png)
## 3. Draw which LED is ON after running this code and pressing Button A twice. Explain why you chose to draw that number
```blocks
let count_ = 0
input.onButtonPressed(Button.A, () => {
count_ = count_ + 1
basic.showNumber(count_, 100)
})
```
![](/static/mb/empty-microbit.png)
<br/>
## 4. Draw which LED is ON after running this code and pressing Button A five times. Explain why you chose to draw that number.
```blocks
let count_ = 0
input.onButtonPressed(Button.A, () => {
count_ = count_ + 1
basic.showNumber(count_, 100)
})
```
![](/static/mb/empty-microbit.png)
<br/>