Math For Programmers 
I've never found any really good resource to learn Math from.The problem I get is that whenever I see a big equation I tend to see a few greek symbols that I have never seen before and I have literally no idea whatsoever what they mean.At least when looking at some unfamiliar code etc I can usually tell from function and variable names approximately what something is supposed to be.Wikipedia is hopeless for learning because the math articles seem to be more interested in being complete and accurate than being accessible. When I hit a math page on something on wikipedia it tends to link off to a whole bunch of other pages on increasingly abstract parts of Math leaving me more confused than when I started.I'd never have time to go through all of these topics and learn them properly, if I was going to do that I'd have become a mathematician.Khan Academy is good, but seems to focus more on the mechanical skill of doing math rather than explaining concepts.