Why do some objects make loud sounds when dropped, while others make quiet sounds?

Pull the lever on learning! Get to know one of the six simple machines with this worksheet about the lever.

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

Did you know that the screw is actually one of the six simple machines? This handy machine helps to make work easier!

Children work on pattern-spotting and observation skills as they determine which of these six type of creatures is a bird.

Did you know that an elevator is actually one of the six simple machines? Help your child understand how the pulley works.

Young inventors will have a blast with this worksheet on compound machines! Use three of the six machines together to make work easier.

I spy with my little eye... six simple machines! Here's a fun way to help your child review the simple machines.

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.

Frogs aren't exactly dinosaurs, but they were around during prehistoric times. Celebrate this resilient species with a dot to dot activity.

Wedge your way into physics fun! You and your child can learn a bit about one of the six simple machines with this worksheet all about the wedge.

Your child has probably tried a potato, but does he know the process it goes through to make it to the table? Find out with this life science worksheet.

Tortoises lived in prehistoric times, and they looked pretty much the same then as they do today. Get to know this long-living reptile with a fun dot to dot.

Teach your child all about the growth cycle of carrots, those bright orange veggies found on dinner tables everywhere.

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

The Alaska state bird is the Willow Ptarmigan, also known as the Willow Grouse. First graders can learn fun facts and add color to the picture of the bird!

Crank out a better understanding of simple machines with this worksheet all about the wheel and axle!

Teach your 1st grader about bees with this fun fact worksheet. Play Sudoku to challenge her logic puzzle skills!

Discover the ways that you can help the planet in your everyday life in this inviting worksheet!

Does your second grader love farm animals? This easy writing exercise will help your child be more observant about tracks left by some familiar animals.

Your budding ornithologist can learn about Minnesota's state bird, the loon, with this coloring page.

Learn all about the California state bird, the Quail (and color it in, too) with this fun page from our State Birds series.

Are chickens mammals, fish, or birds? Sort animals by their traits in this informative life science worksheet!

Detect animal defenses in this hands-on worksheet for kindergarteners through second graders!

What do a key, a goldfish, and a tortoise shell have in common? Find out with this second-grade science worksheet!

Practice describing different objects and substances in this colorful worksheet!

Learn how seeds move with this second- and third-grade matching activity!

Assess the attributes of the amazing nine-banded armadillo in this worksheet!

Discover how seeds move to new places with this cut-and-paste worksheet for second and third graders!

What makes a frog living and a robot nonliving? Use observable traits to distinguish between living and nonliving things!