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In this activity, learners explore chemistry and the microbial world by making their own sourdough starter and bread at home using only flour and water.

In this activity, learners will take a step back and learn the history of the land they live on, and the people who used to live on it.

This activity models some of the ways natural processes, such as erosion and sediment pollution, affect Earth’s landscape.

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

In this activity, learners explore nonrenewable resources and learn why these resources are finite.

In this activity, learners are challenged to build a bird feeder using recycled materials from home and are encouraged to problem solve during the extensions.