Make sense of the numbers
Build your understanding, from the first fractions to the next calculus problem.
Khan Academy
Good resources. Big questions. A little cat-like curiosity. Find something worth learning, and make it your own.
Explore resourcesFor students. For self-starters. For the curious.

A curious mind.
Nine lives of learning.
A few good places to follow your curiosity.
Build your understanding, from the first fractions to the next calculus problem.
Khan Academy
Follow the big questions about stars, galaxies, and everything beyond our planet.
NASA Science
Get to know HTML, CSS, and JavaScript, one useful little project at a time.
MDN Web Docs
Play with forces, energy, and chemistry in experiments you can explore yourself.
PhET · University of Colorado Boulder
Wander through classic literature and find a story you’ll want to get lost in.
Project Gutenberg
Explore single-variable calculus with lectures, worked examples, and problems.
MIT OpenCourseWare
Try another word or look through all subjects.
Resources open on their creators’ websites. A good starting point is just a click away.
You don’t need to have it all figured out. Kit is a little corner of the internet for asking questions, trying things, and finding your own way to understand.
Start with what catches your eye. Take your time. Follow the next question.
Find a place to start