Lombrices movedizas
Informational (nonfiction) 386 words, Level I (Grade 1), Lexile 660L
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Most people don't think much about the small and slimy earthworm, but worms actually have a big role in our environment. Wiggly Worms teaches students about a worm's body and behaviors, how it helps plants and other animals, and its place in the food chain.
Multilevel Book also available at other levels of text complexity.