Hi everyone ! please read and consider this. I understand there has Just been a modification of visualization. But I recall your attention on the possibility for improvement that matches the fact that we are using a screen and we have huge content in this site and we live in a very visual age. Khan academy is great and while learning ,everything is good ,from the cool interactive tools to Sal drawing ,sometimes like a 5 y old child ,which can be incredibly effective . Btw thank you all thank you Sal. Now KA is well organized but i think it lacks a general creativity in the visualization of the content. By this i mean that while a simple list of written words ( with a small visual on its side rapresenting for exemple geometry) can be very helpful, it cannot go alone in giving an idea of the knowledge that is included in the site , nor where you are in that track nor how it is organized. I really really really would like to consider this because we are creative and i am sure we can do something to keep improoving the learning process and i think my call to you is not a simple style opinion . Khan has already been leading edge in what i wrote up here , but we can go further and i think visualization of content and progress is one of the keys. I want to point out btw that oranization of math can be shown in many ways both textually and visually And that the american grade system is certanly helpful on one ground but confusing and misleading on another. Time ago there was a grid for understanding your journey in mastering math , that stupid grid was imo much helpful than the latter organization and of the new features and was much more on the good track for a syntesis-analysis improvement that we can and will always seek and find.