Classroom mode

Run it in class

Why do tiny things grow huge?

Show of hands — before you project anything

Predict first: which grows faster over a month, adding the same amount every day or multiplying by 2 every day? Then we'll race them.

Count the votes out loud. Hold them to it — then watch.

Predict first: which grows faster over a month, adding the same amount every day or multiplying by 2 every day? Then we'll race them.
Adding always makes a straight line, even if the amount is huge. Predict whether a bigger fixed amount can ever beat doubling, then test it on the slider.
Doubling never stops on the screen, but real forests and bank accounts do slow down. Predict what limit stops each one before we name it.

A rumor or chain message spreading through a class — each kid tells two friends and the whole school knows by lunch.
Folding paper, where each fold doubles the number of layers.
Money in a savings account earning compound interest, growing a slice of itself each year.

A prediction-first worksheet — no answer key.

zero prep · no login · any projector

Clickory · wonder sheet

Name ________________________ Date ____________

Predict — what do you think will happen, and why?

Draw what you saw

Talk about it

Predict first: which grows faster over a month, adding the same amount every day or multiplying by 2 every day? Then we'll race them.
Adding always makes a straight line, even if the amount is huge. Predict whether a bigger fixed amount can ever beat doubling, then test it on the slider.
Doubling never stops on the screen, but real forests and bank accounts do slow down. Predict what limit stops each one before we name it.