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In this math activity, learners role-play as wait staff at the Kidtropolis Diner. It's the end of the night and it's time for the staff to collect their tips.

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

In this math activity, learners play a game in which every roll can earn you counters, but if you roll the wrong number (6), you have to put everything back.

In this online puzzle game, learners need to choose a path from a starting number to a goal number. Along the path are simple operations (e.g.

Did you know that you would be a different age if you lived on Mars? It's true!

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 math lesson, learners follow step-by-step directions for making tangram pieces out of folded and torn paper. First, learners read "Grandfather Tang's Story" by Ann Tompert.

In this activity, learners explore and experiment how we can use our bodies everyday to get from one place to another.

In this coin math activity, learners sort and stack 100 (one hundred) pennies into piles of 5 pennies each, 10 pennies each, and 20 pennies each.

In this activity, learners will explore how product barcodes are scanned accurately and be able to "guess" the last number in a 13 digit barcode correctly every time.

This trick from Exploratorium physicist Paul Doherty lets you add together the bounces of two balls and send one ball flying.

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 activity, learners build a scale model of the solar system using a roll of toilet paper.

In this math activity related to light, learners assemble a photometer and use it to estimate the power output of the Sun.

Combine math and exercise with this activity. Learners count how many times in a row they can skip rope or throw and catch a ball.