Take a look at an organized physics course. The 34-section electronic textbook covers material in AP® Physics 1 and 2. Teachers use the text to supplement lectures and have the class work through the labs. Each section contains...

Look at all the things a child can hear and listen to each day. Book includes audio narration in 19 additional languages with text in English.

Using diagrams and animations, students discover how the anatomy of the ear and the physics of sound waves work together to allow us to hear.

Read about the sounds that water makes in taps, fountains, and in nature. Book includes audio narration in 7 additional languages with text in English.