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In this design challenge, learners use their creativity and imagination to design and test a wildlife crossing for their favorite animal.

Learners design their own experiment to investigate how pollution diffuses through ground material.

In this activity, learners construct possible food webs for six different ecosystems as they learn about the roles of different kinds of living organisms.

In this design challenge activity, learners invent an emergency shelter that can fit a person and is sturdy and quick to build.

In this activity, learners explore the web of connections among living and non-living things.