If you are getting your education from only one source of information, then you are doing it wrong. Khan academy is just one source out of many on the web. I pe

If you are getting your education from only one source of information, then you are doing it wrong. Khan academy is just one source out of many on the web. I personally find their videos to be pretty superficial in content, but a good starting point nevertheless. If you really want to learn something in depth, read from as many sources as you can until the picture is clear.