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In this activity, learners get hands-on experience with ratios and scaling while making their own jewelry out of recycled plastic containers.

Straws and pipe cleaners are terrific materials for building models of pyramids and cubes.

Create a “Find Someone” list, with about 10 items, each containing a shape, number, or measurement. Can you find someone in the group with hair about 4 inches long? Someone wearing parallel lines?

In this Cyberchase activity, learners make carpenter's squares and use them to measure square corners. Learners cut out the carpenter's square template and attach it to tagboard.

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 activity, learners will build the highest tower they can out of recycled materials.

Learners describe objects in a room using only numbers and shapes. They can measure the object (like a desk) and make a list of facts about it (e.g.

In this activity, learners follow clues to find five puzzle pieces, then assemble them. This activity works well with a whole group, individuals, or families.

In this math activity, learners trace their hands and estimate the number of beans that can fit into their hand tracings. Then, learners glue the beans to the tracing to test out their estimations.

In this activity, learners use a hand-made protractor to measure angles they find in playground equipment.

In this math activity, learners build Peppy the dog the best trail and park for running around.

How do you measure a bubble when it's floating? You can't really, but in this activity, learners can measure the diameter of the ring of suds a bubble leaves on a flat surface.

In this activity, learners make cool boxes out of old (or new) greeting cards or postcards.

In this activity, learners use their hands as tools for indirect measurement.

Build a house you can fit inside, using cardboard tubes.

In this activity, learners explore how engineers incorporate biometric technologies into products as well as the challenges of engineers who must weigh privacy, security and other issues when designin

In this math activity related to volume, learners use problem solving skills to calculate and build a model house for Minus the dog.