WiFi, Bluetooth, infrared — why does a TV remote need to point, but your phone doesn't?
Open for the projector Present it step by step
Classroom mode
A question for the whole room
One story to open. A room full of ideas to test.
Ready in three steps
- Open the story.Read and try the first pages together.
- Pause for a prediction.At the story’s question, read its choices aloud. Invite a vote and ask, “What makes you think that?”
- Run it. Watch. Wonder.Choose the class’s prediction, run the experiment, and compare what happened with your guesses.
Different guesses are welcome. The experiment gives everyone something to rethink.
Something to put on paper
A one-page prediction and observation sheet. No answers included.
After the experiment: discussion notes
Talk about what happened
- Predict first: if a wall drops between you and the TV, which signal gets blocked — infrared, WiFi, or Bluetooth? Explain your reasoning before testing.
- Infrared, WiFi, and Bluetooth are all invisible. What single difference decides whether a wall stops them?
- Bluetooth and WiFi are both radio and both pass through walls — so what makes them different from each other?
Where it shows up in real life
- Aiming a TV or air-conditioner remote across the room
- Streaming music to earbuds or a speaker from your pocket through a wall
- Joining the home WiFi from a bedroom without pointing your phone anywhere
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