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This "concept demonstration" provides learners with a concrete example (a pair of shoes in a classroom "cell") of what homology means.

In this activity related to flight, learners conduct two simple tests to explore how lift works.

Use multiplication to help the aliens find out how much fuel they need to get their spacecrafts home.

This activity about cryptographic techniques illustrates a situation where information is shared, and yet none of it is revealed.

In this nanoscience activity, learners discover that it's easy to pour water out of a regular-sized cup, but not out of a miniature cup.

In this experiment, learners use a blow dryer and water bottle to observe and record changes in air pressure caused by changes in temperature.

In this exercise (Activity #2 on page), learners test their distance vision to evaluate their overall eyesight.

In this math activity, learners make and explore patterns using the letters in their names, a grid, and some colors.

This simple hands-on activity demonstrates why the sky appears blue on a sunny day and red during sunrise and sunset.

In this math activity, learners play a game and try to collect the most cards by guessing if the next number to appear will be odd or even.

In this math activity, learners find patterns in telephone numbers.

In this game, learners strategize to be the first player to make three in a row.