The earth is round, so why don't some people hang upside down? The answer is gravity! With age-appropriate critical thinking questions and carefully leveled text, young readers will learn all about the concept of gravity while building nonfiction reading skills.

Did you know that liquids flow and take the shape of whatever container they're poured into? Learn more about liquids! With age-appropriate critical thinking questions and carefully leveled text, young readers will learn all about liquids while building nonfiction reading skills.

What kinds of solids can you see right now? Solids are a type of matter that is all around us. They can be heavy or weigh almost nothing. With age-appropriate critical thinking questions and carefully leveled text, young readers will learn all about solids while building nonfiction reading skills.

Audisee® eBooks with Audio combine professional narration and text highlighting for an engaging read aloud experience! Sound is made up of tiny vibrations. Learn how different vibrations create different sounds! With age-appropriate critical thinking questions and carefully leveled text, young readers will learn all about sound while building nonfiction reading skills.

Did you know that light has energy? It helps us see in the dark, it brings color to our world, and it moves through the air faster than sound! With age-appropriate critical thinking questions and carefully leveled text, young readers will learn all about light while building nonfiction reading skills.

Audisee® eBooks with Audio combine professional narration and text highlighting for an engaging read aloud experience! Did you know there are gases all around us, but they're invisible? There are gases in the air that we breathe! With age-appropriate critical thinking questions and carefully leveled text, young readers will learn all about the gases that surround them while building nonfiction reading skills.

What would happen if gravity didn't exist? People and objects would float into space! With this basic introduction to gravity, young readers will discover how gravity works and how it affects everything in our world and beyond.