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

See just how connected the ears, nose and throat are with this anatomy worksheet!

Your child will write about his or her favorite animal. Kids will research their favorite animals online or at the library, then write down three facts.

Learn about the integumentary system, which is really just a fancy phrase for "skin", in this worksheet.

Plants need to breathe and eat food (energy) just like us! Help your budding naturalist to learn about photosynthesis.

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

Help your 2nd grader write out fractions in this underwater adventure.

Learn more about the bones in your body and just how important they are with this reading sheet and diagram, all in one.

This skeletal system worksheet, featuring a funny diagram of a human skeleton, is just the thing kids need to master their skeletal system vocabulary.

This mole has a pouch for its young, just like kangaroos. Get your child into life science learning with this fun coloring page.

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

Plants are living things just like you and me! But how do plants travel? Learn all about seed dispersal with this fun sheet.

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

Do you need a job? Well, this elephant is looking for a new symbiotic partner, and you could be just the candidate he's looking for!

Just like the rest of our body, our eyes are a complicated system! Learn about how the human eye works with this anatomy sheet.

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

Help your child learn about sensory language as they write a 5-senses poem.

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

The emu: It's the second-largest bird in the world. How big is it? Let's just say that its eggs can be almost 9 inches long!

Just like people, animals have babies that grow up into adults. On this worksheet, Kids draw a line to match each baby with its adult version.

Did you know that trees have more parts than just the trunk, branches and leaves? Take a look on the inside of a tree with this fill-in-the-blank diagram!

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.

Just like all plants and animals, you go through different stages in life too! Help your child to see how he will change and grow throughout his life.

What's your favorite animal? Kids love answering that question, and with this animal research graphic organizer, they can write all about it.