Take a quick lesson in the otters that inhabit Yellowstone National Park and take an even quicker quiz.

Here's a quick overview of drought and flooding to spark thoughts or conversation with your kids about water.

Here's a thorough, easy-to-understand breakdown of the color wheel that includes primary, secondary and tertiary colors.

One of the most famous and easy to spot constellations is the Big Dipper! Formally known as Ursa Major, this constellation was named after a bear.

It's easy being green when you have our Earth Day game for a guide. Just print out this Earth Day game and get ready to score one for the planet.

Light travels so quickly that sometimes we can forget it even travels at all. Learn all about the direction light travels and perform your own experiment!

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!

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

Read about the mule deer, the most abundant deer in Yellowstone National Park.

Get a light lesson in the darkest of creatures, the raven.

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

Learn about the amphibians and reptiles of Yellowstone National Park.

Change up your regular classwork with this hands-on science worksheet!

This helpful worksheet lays out all the qualifications for planethood. A great way to start studying outer space science!

Help kids understand the size and scope of billions of years with this helpful reference worksheet.

Introduce children to photosynthesis with this fill-in-the-blanks life sciences worksheet!

Learn to identify and name the parts of a seed in this two-page science worksheet and quiz!

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