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On your countdown, all students hold up their tickets simultaneously. This instantly makes student thinking visible across the entire group. 4. The Exit Gate (Assess)

Leo’s mind clicked into gear. This wasn't just a travel problem; this was a math problem.

: These provide immediate data for teachers to identify which students need extra help before the next lesson. Portable Math Devices

You might ask: "Can't I just use a textbook or a static slideshow?" You could, but you lose the dynamic data loop. Here is why the portable method wins.