Grade 3 - 5

Why does a baking soda and vinegar volcano erupt? That's what happens when you mix and an acid and a base. But just what are acids and bases? What makes them so different? Learn the answers… More →

Throughout history, there have been different civilizations that dominated the world they lived in. Explore the growth and development of key ancient civilizations, including important… More →

Fury faces, scaly flippers, and green vines are vanishing. Why are so many animals and plants disappearing? Climate change is pushing a wave of extinction across the planet. Explore the… More →

There are millions of animals on this planet. Some fly with feathers, others swim under the sea. We use classification to keep them all straight. Follow along with easy-to-understand content… More →

Everything around us is made of matter, but what is matter made of? Atoms and molecules! Learn all about how the smallest things in our universe come together to make the biggest, examine… More →

Bring biology to life with this curricular high-interest, low-reading level series. An engaging exploration of the living world keeps struggling readers interested while carefully leveled… More →

From dry deserts to watery oceans, the world is divided up into many biomes. Explore how the living and nonliving things of a space interact, what makes up each biome, and more. Follow along… More →

Between spending, saving, and earning money, how does anybody keep track of it all? They make a budget! Learn all about budgeting. Discover the different parts of a budget, how people and… More →

From dandelions to dolphins, all living things are made up of the same itty-bitty things--cells. Discover the parts of a cell, the differences between plant and animal cells, how cells… More →

The United States government is strong. But no single person has all that power. What do you know about checks and balances? Discover the roles of the three branches of government, how their… More →

A flickering flame and the smoke curling from a burnt out candle have a lot in common. They are both signs of a chemical reaction. Learn all about the reactions from the smallest atomic… More →

Throughout U.S. history, many groups of people have had to fight for their civil rights--and many are still fighting today. Black Lives Matter protesters work to bring safety to everyone… More →