Maybe I’m wrong but I would assume everyone on hn knows about KA.
It’s been a fantastic resource for a decade, I used it during my undergrad engineering courses to get through some tricky parts. Along with https://tutorial.math.lamar.edu/ Paulsonlinemathnotes
Khan is hugely impressive, I think he started out as an electrical engineering undergrad and it really shows from the way he would set up the problems state the knows and unknowns and then go to work through the math steps to the solution. Early on it really gave me the insight on how to be methodical when working a problem.
It’s been a fantastic resource for a decade, I used it during my undergrad engineering courses to get through some tricky parts. Along with https://tutorial.math.lamar.edu/ Paulsonlinemathnotes
Khan is hugely impressive, I think he started out as an electrical engineering undergrad and it really shows from the way he would set up the problems state the knows and unknowns and then go to work through the math steps to the solution. Early on it really gave me the insight on how to be methodical when working a problem.