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In this activity, learners will predict the size of a giant scale model of a comb or other rectangular object, then make one. If you tripled the size of a dollar bill, could you sit on it?

In this self-measuring activity, learners measure and record the length of their foot.

In this math lesson, learners explore the concept of using units to measure length.

In this activity on page 1 of the PDF, learners compare the relative sizes of biological objects (like DNA and bacteria) that can't be seen by the naked eye.

An ordinary camera has a lens that makes an image on film. In a pinhole camera, a small hole replaces the lens.

Put the math of measurement, numbers, and everyday life into improvisational skits.

Did you know that using a lens one can bend light to make pictures of the world? It's true!

In this activity, learners will participate in a scavenger hunt involving sizes, shapes, and numbers. This activity works well with a whole group, individuals, or families.

This activity (on page 2 of the PDF under SciGirls Activity: Soccer Ball Kick) is a full inquiry investigation into transfer of motion.