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

In this international citizen science activity, learners measure their night sky brightness and submit their observations into an online database.

In this data collection and analysis activity, learners evaluate fish physiology and ecology using vision research data from Dr.

Learners explore their surroundings while reasoning about categories and counting.

In this activity, learners explore a scale by comparing objects, which look similar but have different weights. Learners predict and then measure the weights of various objects using a scale.