We love Khan Academy for whatever you guys do. Providing free and quality education all over the globe is a gigantic task. But what I'm going to say might be quite ambitious and you might not be able to do this right now or you may not want to do this right now but you should definitely do this today or tomorrow. Khan Academy does a great job with the the blackboard Style videos. But the fact is, manytimes it lacks visualisation and creativity. Kurzgesagt, Ted Ed, Crash Course try to make science beautiful and that is what Khan Academy should do. Almost every topic of mathematics especially geometry needs visualisation. We need videos of the style of 3Blue1Brown and Mathematics Online and Zach Star. Sal has amazing ideas but it is time he should change his way of expression for the better of the students. But the new style videos should not be fast-paced and there should be the human feel which is important. Thank you.