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In this activity, learners use two different techniques to estimate how many little things fit into one bigger thing.

Get all wrapped up in a lesson about skin!

In this graphing exercise (page 2 of the pdf), learners compare their own height to the length of various sharks.

This investigation provides learners with a hands-on activity that simulates the changing relationship of surface areas-to-volume for a growing cell.

Learners draw and cut out shapes of organs from construction paper. Then they attach these organs to the body of one learner to make a life-sized map of all the internal organs.