Petr M.
The courses are nice
The courses are nice, and I appreciate it's free. However, if you want to get proficiency at the subjects you are trying to learn, don't rely just on Khan Academy. Do yourself a favour and buy some books, and spend some time extra. As far as I'm concerned, the older courses would need some polishing and a new coat since the quality is quite bad. 8,8 / 10 - Great


