Anyone who is intimidated math, I highly recommend reading through his site. Paul's Online Notes got me through all of my math requirements for my CS program. I would go to my lecture and struggle to understand what was going on each week. When it came time to do my homework, I'd read his notes on whatever class I was taking (Calc, Linear Algebra, Diff Eq) and instantly feel better and have more understanding. I cannot praise this site enough.

I was astonished how high-quality and accessible this is, so I decided to submit it in case someone else finds it as handy.

My man Paul's always got the goods. This MF got us from algebra all the way to Diffy qs. If it weren't for him and Khan I think half the engineering graduates would've flunked

Let’s not forget wolfram. Wolfram alpha made me good at math. The fact that you can specifically ask it to solve sub components of a more complex problem is fantastic for figuring out where you’re misconceptions are hiding.