Slide into a lesson on proportions. A slider interactive lets users adjust three of the four values in a proportion and automatically updates the fourth value. Scholars use the interactive to help answer a set of challenge questions on...

Inject a great interactive into your lesson plans. Scholars learn about injections, surjections, and bijections of sets. They use an interactive that shows an example for each of these relationships between sets.

History enthusiasts participate in an interactive website that brings Abraham Lincoln to life as he shares his personal experiences between 1854-1864. Scholars listen and read carefully to form their own opinions and discover if they...