Interactive
CK-12 Foundation

Prices Involving Sales Tax: Proper Tipping

For Students 6th - 8th Standards
A five-question interactive challenges mathematicians to find a correct tip and total amount using percents five, 12, and 18. A tool with moveable pieces assists participants in locating answers. Types of questions include...
Interactive
Harvard University

Harvard Smithsonian: Everyday Classroom Tools

For Teachers Pre-K - 1st
The focus of this series of lessons is to engage students in an exploration of the world around them. The emphasis is on inquiry as students learn about the earth, sun, light, shapes and more.