Every four years something funny happens with our calendars -- we add a day! Why do we do this? Discover the science behind leap year.

Discover how myths explain the origins of the world with this fifth- and sixth-grade reading comprehension worksheet!

Learn about the foundational process of American democracy in this essential worksheet!

Explore the sights and sounds of the prairie with this fourth- and fifth-grade reading-comprehension activity!

What is that strange object in the sky? This prompt will be a lift off for your young writer's imagination as he creates a story to match the picture.

Learn about the human brain with this zombie-themed science worksheet!

Introduce how pronouns work and why they're so important with this informative worksheet.

Roses are red, violets are blue, I know the parts of a flower, how about you? Learn about flower anatomy with this worksheet.

The cool blue tones of this long division printable will calm your fifth grader's nerves as she sets to work learning this important fifth grade concept.

Learn what Constitution Day is and why it’s important in this engaging passage!

In this worksheet, children read the story of Parks' act of passive resistance, then follow a series of thoughtful prompts to reflect on why the boycott was successful, as well as why it inspired the support of so many people around the United States.

Ever wonder why zebras have so many stripes? Find out with this fun worksheet all about the zebra!

Learn why and how we celebrate Asian American and Pacific Islander Heritage Month with this engaging worksheet!

Learn more about why supply and demand change in this economics worksheet! 

Ever wonder why sounds change as they move away from us? Learn all about the Doppler effect with this physics worksheet.

Why did the fox cross the road? To look for the chicken! This fun worksheet is jam-packed with fun facts about foxes!

Is a book a good or service? Why? Determine whether items are goods or services in this fourth- and fifth-grade worksheet!