Which has a higher momentum: a slow-moving truck or a fast-moving car? Interestingly, they can carry the same amount of momentum! Explore this mass in motion and discover how momentum is conserved.

What if you had $15.39 in your pocket (the one with the hole in it!) and some of it fell out. How would you figure out how much you lost? Learn to subtract large numbers while playing a fun card game!

Oh good, those sneakers I want are discounted! But do I have enough money to buy them? How much are they? Learn the two ways to calculate discounts so you can be a better shopper (candy not included)!

If you met a snake, would you rather meet a long snake or a short snake? Would you stick around to measure it? Learn how to measure things short and tall!

It's always right to do right but must it always be right away? Why did President Lincoln write the Emancipation Proclamation? Why didn't he release it right after he wrote it? Did it free anyone?

The faces of immigrants have changed over the centuries. Learn about the largest immigrant groups in America today, classifications of immigrants, and their reasons for coming to the U.S.

Do you have a nickname? Does your ethnic group have a nickname? There is an ethnic group in China, with a cute-sounding nickname, who ruled the land for centuries. Learn about their ancient history!

A birthday is an important celebration of a person's life. People around the world celebrate birthdays in different ways. What's your favorite way to celebrate a birthday? Maybe you'll find a new way!

Have you ever witnessed the bullying of a classmate, friend, or stranger? What was your reaction to the situation? Did you step in to defend the victim, or simply stand by and watch? How did you feel?

Have you ever heard of metaphors? Well, they are parts of speech that help your writing pop! They are the icing on the cake of writing! Examine some poems to learn what they are and how to use them!

What’s your style? Do you wear pink polka dots in summer or tight skinny jeans? Just as in life, there are different ways of styling your writing. Discover the point of view that suits your style!

Graphic organizers are not tools you use to put your pictures in order; they are diagrams that help you organize your thoughts when you are preparing to write. Choose the one that is right for you!

In 1997, the idea of human cloning moved from science fiction to a real possibility after scientists in Scotland cloned the very first mammal — a sheep named Dolly. Learn all about her amazing story!

Can you guess why films are called movies? Why people are called actors? Not only do people move and act in films, but so can drawings! Learn (and try!) how animation makes the inanimate move!

From the prehistoric dinosaur to the modern blue whale, dive deep to uncover the secrets behind the earth's biggest animals.

Since so many insects can fly, why is only one called a fly? We won't answer that, but we will show you how fascinating these common pesky creatures are. How DO they stick to ceilings and walls?

What if you never brushed your teeth or washed your hands or ate vegetables or drank milk or used money? How would you function? (How would you smell?) Brush up on these basic life skills quickly!

Have you ever wanted to download and use an image from the internet on a blog or website? If you have, you need to know about copyright laws. Explore more about what this important term means!

Read and listen to short stories in Spanish to learn new vocabulary to talk about places, things, and feelings!

There are so many jobs you can choose to work at when you become an adult. What would you like to be when you grow up? What do you need to learn? Discover some really cool jobs now in this fun lesson!

Does music influence the culture or does culture influence music? What do you think of music that maybe your grandparents listened to? Learn about a truly American musical form and learn some history!

Have you ever listened to music and just had to move to it? People all around the world express themselves through dance. Have fun learning about, joining, and making your own dances!

Some conservationists work to preserve the glories of our environment. Others work to maintain culture heritages. But what about conserving great art? What does that entail, and is it for you?

Majestic with its sheer cliff faces and tumbling waterfalls, Yosemite intrigues adventurers, nature lovers, and artists alike. See its awe for yourself through photography.