ELI5: Explain Like I'm 5

Textbook

Okay, buddy. A textbook is a big book that has a lot of information in it to help you learn. It's like your teacher's helper because it teaches you about different subjects that you need to know about in school. The information in the textbook is usually divided into chapters with pictures and words to help you understand better. You'll use your textbook to study and learn about different things in school.