edit: aleks

Online Learning!

I found a couple of very powerful websites that can help a whole lot of people, I believe.

Coursera.org
this website has several college-level courses for free, hosted by professors working from colleges like Duke, Stanford, Yale, Princeton, etc. you get the idea.

Aleks.com
This website is an assisted AI that focuses on harder sciences and mathematics, and provides problems and other work for you to do. Starts with a free trial, but costs 19.95/month US dollars.

Khanacademy.com
This website provides knowledge of several fields of study, all for free! It has upgraded recently so that you can work with math problems and progress on your own speed.