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National Geographic
Animal Habitats
Explore animal habitats and reinforce speaking, listening, reading comprehension, and writing skills with a unit that focuses on the Arctic, desert, ocean, prairie, and rainforest. Enthusiastic scientists read informational text to...
Howard Hughes Medical Institute
Modeling Trophic Cascades
In the ecological game of who eats who, one small change can have a big impact! Individuals create food chains in an array of ecosystems, then determine what happens to organisms in the chain when one organism changes its feeding...