Fly high with The Wright Brothers, two siblings who soared to the forefront of history with their design for the first modern airplane.

Download this worksheet for answers to our animal reading comprehension series.

Life on Earth is vast and varied, from high in the sky to the bottom of the sea. Learn more about what lives on Earth with this reading and quiz worksheet.

This reading comprehension worksheet focuses on Brazil's incredible natural resources, targeting both Earth science and language arts.

Pick up some facts about squids, including about the fascinating Giant Squid, and do a bit of writing on this reading comprehension worksheet.

This worksheet is all about the U.S. space mission of Friendship 7, and will help kids with reading comprehension and U.S. history knowledge all at once.

Has your child learned about the life cycle of a frog in school? Test his understanding with this cute cut and paste worksheet.

The California condor has been brought back from the brink of extinction. This worksheet will help your little bird lover learn all about the condor.

This worksheet tests kids' understanding of basic heredity by asking them to match parent turtles with their offspring based on similar traits.

Playing in the dirt was never so educational! Shake things up with this fun experiment about soil.

Learn how sand dunes form, and a little bit about desert formations like yardangs as well, in this science summary sheet.

Ancient mariners mistook the manatee for a mermaid! Your young biologist won't make the same mistake after learning about the manatee with this worksheet.

This tree anatomy worksheet will give your little naturalist a better understanding of the parts that make up a tree.

The earth is always changing and moving.Learn all about weathering and erosion with this worksheet.

The Goliath birdeater is a spider that lives in South America. Your child will read a paragraph about spider before writing an opinion sentence.

Dig your hands into some earth science with this soil sheet! Your little scientist can hone his reading skills as he learns what soil is and how it is formed.

Little scientists can learn about a fundamental concept of physical science with this worksheet all about density!

Budding scientists can learn about an important physical science concept with this worksheet all about density!

Learn about the animal practice of hibernation in this quick science worksheet.

Help your second grader understand the different types of weathering and how they can affect the earth.

What is geothermal energy? Find out how we use parts of the Earth to provide us with renewable energy!

What is wind energy? Teach your students how we can use the wind to create electricity!

What is water energy? Also known as hydro power, water energy is one of our important renewable resources!

The silverback gorilla is a special animal. This magnificent male is part of an endangered species. Complete this sheet to learn all about this gentle giant.

The horned lizard has a scary exterior but a gentle personality. Your little student can learn about this North American lizard with this worksheet.

Whether you say buffalo or bison, it is still the largest land mammal in North America. Discover a bit more about this majestic animal.

What is biomass energy? Learn about an important form of renewable energy with this colorful worksheet.

Learn about the amphibians and reptiles of Yellowstone National Park.

What's in the ground beneath our feet? Explore the science of soil with your child using this handy printable!

Quiz your little scientist on his knowledge of the soil layers! He'll be reviewing some important earth science concepts and key terms.