Have you considered why elephants have trunks, or why polar bears have thick fur? Reflect on animal adaptations with this fourth-grade worksheet!

Bird-watchers will love this worksheet, featuring just a sample of the many song birds flying around Yellowstone National Park.

Introduce your flashlight to mirrors. Mirrors are cool surfaces that reflect light just as well as they reflect your face.

Constellations are not just named after animals, some of them are named after people! Learn about the constellation Sagittarius with this fun worksheet.

Introduce your child to a fascinating new animal, the Baird's tapir. This is just one of many endangered species around the world.

Coyotes' famous howl gave them the nickname "song dogs." This is just one of several coyote facts your child can learn from this worksheet.

Where'd that shadow come from? Next time a scary shadow crosses your path, you'll know just what to look for.

What is the Earth made of? Find out everything that goes on just below the surface in this science reading worksheet.

With this fun sheet, your child will get to learn a few fun facts about the raven, and then complete a crossword based on what she's just learned.

Who knew that the machines of the world are all made of just 6 simple machines working together? Introduce your child to simple machines with this worksheet.