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In this activity, learners overlap the three primary colors to see how all other colors are made.

This is an activity (located on page 131 of the PDF) related to sleep and circadian rhythms as well as space travel.

In this activity, learners use a laser pointer, empty soda bottle, rubber plug and water to demonstrate total internal reflection.

This is an online game about stopping distance. Learners choose one of three vehicles and one of three speeds.