PlanetMath

Planetmath is like a big library where you can learn about math things. Imagine you're in a big room with lots of books about math. If you want to learn about shapes or numbers or how to add and subtract, you can find a book about it in this big room.

But Planetmath isn't just any library, it's a special kind of library that you can use without leaving your house! You can go to the Planetmath website and look at all kinds of math books anytime you want.

In Planetmath, you can also see how things are related to each other. For example, you might look at a book about numbers and see that it's related to a book about multiplication. That means that if you understand numbers, you might be able to understand multiplication too.

So, if you like math and want to learn more, Planetmath is a great place to explore!