Khan Academy
You might be paying for: Paid tutoring ($30–$100/hour), educational subscriptions
World-class education in math, science, economics, and more — for no monthly fee.
What you get
- ✓Full courses with video lessons and exercises
- ✓Progress tracking
- ✓Teacher tools
- ✓SAT prep and AP courses
What's different from the paid version
No premium tier, no ads, no hidden fees. This is a nonprofit doing exactly what it says. Used in actual schools worldwide. One of the best things on the internet.
Perfect for
Students, parents, lifelong learners, and anyone who wants to understand something better.