Provider
Topic
Level
7th - College
Price
Free
None
Add-ons available
Common Core
Yes
No
They’re everywhere. They number in the millions of trillions of trillions. They live on every surface, in every environment, and even in your gut. That’s right…I’m talking about prokaryotes! Learn more about bacteria and archaea.
Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computing, history, art history, economics, and more, including K-14 and test preparation (SAT, Praxis, LSAT) content. We focus on skill mastery to help learners establish strong foundations, so there's no limit to what they can learn next!