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River Catcher
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In this activity (located at the top of the page), learners make an easy river strainer and see what they can catch.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-604.jpg?itok=r7Od32Y0)
Shoe Dichotomous Key
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In this activity (on page 2 of the PDF under GPS: Cactus Activity), learners will develop their own version of a tool used by biologists, a dichotomous key, by collecting all their left shoes.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-957.jpg?itok=tIFoqkQV)
Sort It Out!
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In this activity, learners explore how engineers have developed sorting systems which integrate into manufacturing and packaging processes. Learners explore how coins are made.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-994.png?itok=WHt8LGfO)
Milli's Super Sorting Challenge
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In this activity, learners separate materials based on their special properties to mimic the way recyclables are sorted at recycling centers.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-402.jpg?itok=VdFL1_8B)
Life in the Sidewalk Cracks
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In this activity, learners compare plant and animal life in different habitats including a sidewalk crack and lawn. Learners sort human-made materials and natural materials found in each habitat.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-305.png?itok=6nnsFzQ4)
Guess My Rule
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In this activity, learners play a guessing game to explore classification.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-000-592.png?itok=KnUMP3Z6)
Count Around
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Learners explore their surroundings while reasoning about categories and counting.