Modern Topics

Hi, I am currently reading about light and EM waves, and I stumbled upon an article where it said that  a single photon can carry 10 bits of information. So I hd the question that how do photons ex...

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2. Study Group

Computer coding

Hi, just a minor request but can we add a learning python course in Khan Academy? I like coding a LOT and I want to learn at least three languages. Nobody explains concepts better than khan academy...

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2. Content Requests and Feedback

Mastery In a Course

Hi, I was just wondering if you can achieve mastery in a course without doing the course challenge. Because If you achieve master in all of the skills, then you have basically mastered the course.

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2. General Khan Academy Questions