1. Közösség
2. Study Group
3. Is Khan academy pre-cal enough?

I suggest you doing all the Precalculus section (100 %) and then moving on to a textbook. Don't stop learning. I haven't seen the material but Precalculus is a broad course. I suggest you after doi...

1. Közösség
2. Technical Issues and Workarounds
3. I keep losing my points

Oh, that's kind of sad. But fair enough. I'm very glad for your help! It's a shame that that little percentage has to be obtained by doing the unit test again (i.e. 30 questions correct in a row). ...

1. Közösség
2. Technical Issues and Workarounds
3. Course listing not showing progress percentage complete

Agree, it has been some days since it hasn't displayed. I think is because of the new implementations coming tomorrow. 

1. Közösség
2. General Khan Academy Questions
3. How do I ask more than 1 doubt on the website

Strange. It shouldn't. Make sure you hit Enter when asking a question, sometimes if you go back and you didn't pressed Enter it will not save.   

1. Közösség
2. General Khan Academy Questions
3. Official Chrome Extension?

Official no. Why would you want it though?