Introduce your child to the inclined plane, one of the six simple machines that helps to make work easier for us!

Meet one man whose influence is all around us: I.M. Pei, one of the most celebrated architects of the 20th century.

"I" adjectives give us imaginary, industrious and intelligent! Your little writer will learn an incredible amount of descriptive words starting with "I".

Hooray for interjections! Interjections add flavor to our language by helping us express emotions. Kids can get creative with interjections with this worksheet.

Fossils have a lot to teach us about life on earth, but they can also be used to help teach kids the scientific method.

This coloring page features Poseidon, god of the sea. Thankfully for us, Poseidon isn't feeling particularly vengeful today. In fact, he looks downright jolly!

Did you know that buildings have symmetry too? Almost everything around us has symmetry! Find the line of symmetry in each of these famous buildings.

What does a plant need to grow? Just like us, plants need food, water and air! Help your child understand more about plant life.

Microscopes bring biology to life, allowing us to explore the world's tiniest living things. Have your child create his own organism in the sample slide.

Adverbs are words that describe verbs, and tell us when, where or how action occurs! Help your child master her parts of speech with this worksheet.

In this worksheet, we listen like like an owl — and go on a sound hunt — to become more aware of the sounds around us.

Are cats trying to talk to us when they purr? Discover the meaning behind the purr in this worksheet that explores the three main types of cat purrs.

Read about Alexander Graham Bell, the man who made it possible for us to stay connected all day long, in this biography that comes with a science experiment.

Nature is all around us! But how much does your child know about our natural world? Test her knowledge with some nature fun-facts trivia.

Meet the quagga! Though now extinct, quaggas look familiar to us because they were actually half horse, half zebra. Add some color to this cheerful quagga.

Learn the basic facts about the U.S. flag and see the different places where it's waved.

Is that a haunted house on the dollar bill? A ghost on the quarter? Play with some Halloween-themed money while learning how to count.

Can you explain why your blue shirt is blue? This worksheet is full of facts about light and how it reacts with objects to give us the perception of color.

Clues can help us make predictions! Students will read a story about Molly, find the clues, and use those clues to predict what Molly will do next.

Hiccups interrupt us when we're talking and sometimes even get in the way of eating! Find out why we hiccup and discover some unusual ways to get rid of them.

Explore the concept of place with this engaging kindergarten and first-grade worksheet!

Discover different environments with this geography worksheet for kindergarteners and first graders!

Spheres are all around us—basketballs, globes, even the planet Earth! Help your students develop an understanding of this 3-D shape by identifying spheres in pictures and in real life.

Children learn why the light from the sun seems white to us, why we see objects in color, and why the sky is blue in this beautiful and fascinating worksheet.