Really good

Im a biology student and just watched the first few intro videos of the category biology and chemistry of life. The explanations are very detailed (and easy to understand, also if you are
not a scientist yet :P ) and the topics are well structured. There are many subcategories and up to now everything was scientifically correct. You dont have to watch the videos and just read what the lecturer says and go on at a chosen point again. Or stop the video and read again what he just said. He also always visualises what he says. All in all I already like this App very much and think Im probably gonna spend much time on watching videos.

Quaaaaak! about Khan Academy, v3.1.9