Your young airplane enthusiasts will enjoy this collaborative task of graphing an airplane's distance from the ground as it flies in a perfect circle. They will discover that they have graphed a sinusoidal function that comes from the...

Run like a lion! As the teacher calls out an animal, one person from each team runs to the cone at the opposite end of the gym like the animal that was called. Then run back and high-five the next person in line signaling them to go....

This website describes the conditions of a "perfectly competitive" market structure, and the obstacles that the individual firm in this market will face.