diff --git a/docs/SUMMARY.md b/docs/SUMMARY.md
index 16f1d46d..182211e3 100644
--- a/docs/SUMMARY.md
+++ b/docs/SUMMARY.md
@@ -41,12 +41,8 @@
     * [Reverse Beeper 1](/coding/reverse-beeper-1)
     * [Reverse Beeper 2](/coding/reverse-beeper-2)
     * [Reverse Beeper 3](/coding/reverse-beeper-3)
-    * [Ignition 1](/coding/ignition-1)
-    * [Ignition 2](/coding/ignition-2)
-    * [Ignition 3](/coding/ignition-3)
-    * [Cruise Control 1](/coding/cruise-control-1)
-    * [Cruise Control 2](/coding/cruise-control-2)
-    * [Cruise Control 3](/coding/cruise-control-3)
+    * [Ignition](/coding/ignition)
+    * [Cruise Control](/coding/cruise-control)
     * [Roaming 1](/coding/roaming-1)
     * [Roaming 2](/coding/roaming-2)
 
diff --git a/docs/coding/cruise-control-1.md b/docs/coding/cruise-control-1.md
deleted file mode 100644
index a0490ec2..00000000
--- a/docs/coding/cruise-control-1.md
+++ /dev/null
@@ -1,10 +0,0 @@
-# Cruise Control Activity 1
-
-```blocks
-let speed = 0;
-sensors.touch1.onEvent(ButtonEvent.Pressed, function () {
-    if (speed < 100)
-        speed = speed + 10;
-    motors.largeBC.run(speed);
-}) 
-```
\ No newline at end of file
diff --git a/docs/coding/cruise-control-2.md b/docs/coding/cruise-control-2.md
deleted file mode 100644
index e7f39ccc..00000000
--- a/docs/coding/cruise-control-2.md
+++ /dev/null
@@ -1,15 +0,0 @@
-# Cruise Control Activity 2
-
-```blocks
-let speed = 0;
-sensors.touch1.onEvent(ButtonEvent.Pressed, function () {
-    if (speed < 100)
-        speed = speed + 10;
-    motors.largeBC.run(speed);
-}) 
-sensors.touch2.onEvent(ButtonEvent.Pressed, function () {
-    if (speed > -100)
-        speed = speed - 10;
-    motors.largeBC.run(speed);
-}) 
-```
\ No newline at end of file
diff --git a/docs/coding/cruise-control-3.md b/docs/coding/cruise-control-3.md
deleted file mode 100644
index 751a55b4..00000000
--- a/docs/coding/cruise-control-3.md
+++ /dev/null
@@ -1,28 +0,0 @@
-# Cruise Control Activity 3
-
-```blocks
-let speed = 0
-function decelerate() {
-    if (speed > -100) {
-        speed = speed - 10
-    }
-}
-function accelerate() {
-    if (speed < 100) {
-        speed = speed + 10
-    }
-}
-function update() {
-    brick.clearScreen()
-    brick.showString("speed: " + speed, 1)
-    motors.largeBC.run(speed)
-}
-sensors.touch2.onEvent(ButtonEvent.Pressed, function () {
-    accelerate()
-    update()
-})
-sensors.touch1.onEvent(ButtonEvent.Pressed, function () {
-    decelerate()
-    update()
-})
-```
\ No newline at end of file
diff --git a/docs/coding/cruise-control.md b/docs/coding/cruise-control.md
new file mode 100644
index 00000000..902c96d3
--- /dev/null
+++ b/docs/coding/cruise-control.md
@@ -0,0 +1,65 @@
+# Cruise Control
+
+Learn how to set and adjust motor speeds.
+
+## Activity 1
+
+Increase motor speed when touch sensor `1` is pressed.
+
+```blocks
+let speed = 0;
+sensors.touch1.onEvent(ButtonEvent.Pressed, function () {
+    if (speed < 100)
+        speed = speed + 10;
+    motors.largeBC.run(speed);
+}) 
+```
+
+## Activity 2
+
+Add a "reduce" motor speed action when touch sensor `2` is pressed.
+
+```blocks
+let speed = 0;
+sensors.touch1.onEvent(ButtonEvent.Pressed, function () {
+    if (speed < 100)
+        speed = speed + 10;
+    motors.largeBC.run(speed);
+}) 
+sensors.touch2.onEvent(ButtonEvent.Pressed, function () {
+    if (speed > -100)
+        speed = speed - 10;
+    motors.largeBC.run(speed);
+}) 
+```
+
+## Activity 3
+
+Refactor your code by moving the speed increase and speed decrease code into ``||functions:accelerate||`` and ``||functions:decelerate||`` functions. Run the motors at the new speed in an ``||functions:update||`` function.
+
+```blocks
+let speed = 0
+function decelerate() {
+    if (speed > -100) {
+        speed = speed - 10
+    }
+}
+function accelerate() {
+    if (speed < 100) {
+        speed = speed + 10
+    }
+}
+function update() {
+    brick.clearScreen()
+    brick.showString("speed: " + speed, 1)
+    motors.largeBC.run(speed)
+}
+sensors.touch2.onEvent(ButtonEvent.Pressed, function () {
+    accelerate()
+    update()
+})
+sensors.touch1.onEvent(ButtonEvent.Pressed, function () {
+    decelerate()
+    update()
+})
+```
\ No newline at end of file
diff --git a/docs/coding/ignition-1.md b/docs/coding/ignition-1.md
deleted file mode 100644
index b9d5fe0f..00000000
--- a/docs/coding/ignition-1.md
+++ /dev/null
@@ -1,11 +0,0 @@
-# Ignition Activity 1
-
-```blocks
-sensors.touch1.onEvent(ButtonEvent.Pressed, function () {
-    brick.showImage(images.eyesDizzy)
-})
-sensors.ultrasonic4.onEvent(UltrasonicSensorEvent.ObjectDetected, function () {
-    brick.showImage(images.eyesTiredMiddle)
-})
-brick.showImage(images.eyesSleeping)
-```
diff --git a/docs/coding/ignition-2.md b/docs/coding/ignition-2.md
deleted file mode 100644
index 61bafd21..00000000
--- a/docs/coding/ignition-2.md
+++ /dev/null
@@ -1,12 +0,0 @@
-# Ignition Activity 2
-
-```blocks
-while (true) {
-    if (sensors.touch1.wasPressed() &&
-        sensors.ultrasonic4.distance() < 10) {
-        music.playSoundEffectUntilDone(sounds.mechanicalMotorStart)
-        music.playSoundEffectUntilDone(sounds.mechanicalMotorIdle);
-    }
-    pause(1);
-}
-```
diff --git a/docs/coding/ignition-3.md b/docs/coding/ignition-3.md
deleted file mode 100644
index 0b17c54c..00000000
--- a/docs/coding/ignition-3.md
+++ /dev/null
@@ -1,13 +0,0 @@
-# Ignition Activity 3
-
-```blocks
-while (true) {
-    if (sensors.ultrasonic4.distance() < 10 &&
-        sensors.touch1.wasPressed() &&
-        brick.buttonEnter.wasPressed()) {
-        music.playSoundEffectUntilDone(sounds.mechanicalMotorStart)
-        music.playSoundEffectUntilDone(sounds.mechanicalMotorIdle);
-    }
-    pause(1);
-}
-```
diff --git a/docs/coding/ignition.md b/docs/coding/ignition.md
new file mode 100644
index 00000000..8a4521d9
--- /dev/null
+++ b/docs/coding/ignition.md
@@ -0,0 +1,48 @@
+# Ignition
+
+Explore sensor events and sensor status.
+
+## Activity 1
+
+Wait for a touch sensor press or ultrasonic object detection. Show an expression on the screen when they happen.
+
+```blocks
+sensors.touch1.onEvent(ButtonEvent.Pressed, function () {
+    brick.showImage(images.eyesDizzy)
+})
+sensors.ultrasonic4.onEvent(UltrasonicSensorEvent.ObjectDetected, function () {
+    brick.showImage(images.eyesTiredMiddle)
+})
+brick.showImage(images.eyesSleeping)
+```
+
+## Activity 2
+
+Play some motor sounds if touch sensor `1` is pressed at the same moment when and object comes close.
+
+```blocks
+while (true) {
+    if (sensors.touch1.wasPressed() &&
+        sensors.ultrasonic4.distance() < 10) {
+        music.playSoundEffectUntilDone(sounds.mechanicalMotorStart)
+        music.playSoundEffectUntilDone(sounds.mechanicalMotorIdle);
+    }
+    pause(1);
+}
+```
+
+## Activity 3
+
+Play some motor sounds if touch sensor `1` is pressed when both the `enter` button is pressed on the brick and an object comes close.
+
+```blocks
+while (true) {
+    if (sensors.ultrasonic4.distance() < 10 &&
+        sensors.touch1.wasPressed() &&
+        brick.buttonEnter.wasPressed()) {
+        music.playSoundEffectUntilDone(sounds.mechanicalMotorStart)
+        music.playSoundEffectUntilDone(sounds.mechanicalMotorIdle);
+    }
+    pause(1);
+}
+```
\ No newline at end of file