Student Instructions
                    1. Tap the 
 button to start your activity. 
2. Choose an object to measure using centimeters and millimeters.
3. Tap the 
 button and take a picture of your ruler π next to the object.
4. Tap the 
  button to tell me how you know where to put the ruler π
5. Tap the 
 button and write how many cm and mm long the object is. 
6. Do this for 5 different objects.
7. Tap the 
 button to send to your teacher.