Classroom mode
Run it in class
How does a glass screen know exactly where your finger is?
Show of hands — before you project anything
Predict before testing: will a wool glove work if you press as hard as you can? Why or why not?
- A Way more than you'd guess
- B About what you'd guess
- C Way less than you'd guess
Count the votes out loud. Hold them to it — then watch.
Project it (fullscreen)
Discussion prompts
- Predict before testing: will a wool glove work if you press as hard as you can? Why or why not?
- Predict whether a metal spoon and a plastic pencil will work the same on a touchscreen — then explain your reasoning using the word 'electricity'.
- If the screen senses charge instead of pressure, predict what would happen if two fingers touched at once. How could one chip track both?
Where it shows up in real life
- Tapping a phone with winter gloves on and being ignored, then working bare-fingered.
- A rain-wet or sweaty screen tapping itself with ghost touches.
- Pinching to zoom on a map or photo with two fingers at the same time.
A prediction-first worksheet — no answer key.
zero prep · no login · any projector
Winding down at home? Family mode ·
Explore every question
How does a glass screen know exactly where your finger is?
Predict — what do you think will happen, and why?
Talk about it
- Predict before testing: will a wool glove work if you press as hard as you can? Why or why not?
- Predict whether a metal spoon and a plastic pencil will work the same on a touchscreen — then explain your reasoning using the word 'electricity'.
- If the screen senses charge instead of pressure, predict what would happen if two fingers touched at once. How could one chip track both?