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In this activity, learners discover how to determine the distance to a lightning strike or nearby thunderstorm.

In this math activity, learners play a game similar to 20 Questions, in which learners must identify a secret number drawn from a bag.

In this activity, learners discover that a material can act differently when it's nanometer-sized.

In this math game, learners solve a mind-twisting puzzle using dominoes. Use this activity to help learners practice counting, adding, and solving problems.

This math challenge, played with two players or a whole group, engages your problem solving skills.

In this math puzzle, one player hides a rainbow of four colors while another player tries to guess the hidden rainbow colors in the correct order.

This activity (page 2) draws upon a familiar, computer-based concept related to visual resolution: pixilation.

In this math activity, learners play a game and use a variety of strategies to solve a hidden number problem (or missing factor). Learners practice their number and operations skills.

In this activity, learners work in pairs to measure each other's ankles with lengths of string.

In this activity, learners investigate the properties of graphene and graphite.

In this activity, learners investigate what happens when you build up static electricity on plastic balls.

In this math activity, learners practice comparing fractions.

In this activity, learners find as many combinations of a hundred as they can using various puzzle pieces from a hundred square grid paper.