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Little biologists will use this respiratory system diagram to identify the most important parts of the human respiratory system and their functions.

Challenge your child's knowledge of astronomy with this space-themed worksheet, which focuses on the timing of cosmic events.

After he fills in the blanks, your student can hold on to this worksheet on hydrogen for reference when preparing for tests and quizzes on physical science.

In this colorful worksheet, children practice categorizing a few familiar objects by the season they are used in.

"The hip bone is connected to the...?" Sing the song perfectly with the help of this worksheet on the skeletal system!

Meet the residents of the Rocky Mountains with this set of finger puppets that features a cast of Rocky Mountain animals.

Use this life science worksheet to help middle school students boost their understanding of photosynthesis and how matter and energy cycle on Earth.

Give students a chance to explore the energy and forces that are responsible for cycling water through Earth’s systems in this engaging science worksheet!

Kids completing this preschool science worksheet circle the appropriate clothes for fall weather.

Use this worksheet to learn Cassowary facts, and introduce your child to an exotic species of bird from Down Under.

If your child prefers scaly and slithery to soft and fluffy, here's a worksheet on the goanna, a large lizard that lives in Australia.

Test your knowledge of prehistoric animals with this life sciences crossword puzzle!

The Pennsylvania state bird, the Ruffed Grouse, is medium-sized and lives in the Appalachian Mountains. Learn more fun facts and add color to bring it to life!

Which of these animals does not belong? Explore the plants and animals of the desert, and choose which ones are in their right habitat.

Take a plunge under the surface of the earth! With this worksheet as your guide, you may explore the geological processes of our planet.

Did you know that insects like dragonflies have life cycles that are very similar to our own? Help your little scientist get to know the circle of life.

Without light sources, we wouldn't have any light. Can you imagine a world without any light sources?

Did you know new species of animals are discovered every year? Color in this little cricket, the only one of his kind who can pollinate plants!

This lizard can grow to over six feet long! Color the Golden Spotted Monitor Lizard, one of several brand new species discovered between 2009 and 2011.

Some devious mice have stolen important information from the periodic table. Can middle-grade chemists put the elements back together again?

This painless--even fun!--worksheet gets middle-grade students practicing with the information in the periodic table of elements.

Do you ever see shapes in the stars at night? In ancient times, people named these shapes, and now we know them today as constellations!

Learn the scientific names of this popular flower and its partner, the grasshopper, with this fun coloring sheet!

Before trees grow into trees, they start out as little seeds. Can your child match the fruit and seeds with the trees (or plants) they came from?

Use this worksheet to help teach your preschooler what everyday things use electricity to function.

Did you know people can live with just one kidney? Get a head start on human anatomy with this info sheet on kidneys.

Boost little ones' weather sense with this engaging matching worksheet.

Children put their science vocabulary to the test with this engaging crossword puzzle!

Here's a fun way to review photosynthesis with your child! She'll show off her science knowledge as she answers questions to complete the crossword puzzle.

Children hone their observation skills by matching the tracks to their corresponding water animal in this worksheet.