Homeschool comes to youtube. Khan Academy is a free online you-tube based tutorial service that walks you through pre-algebra to trig to money management, and more. It also helps you with Singapore math.
The Khan Academy is a not-for-profit organization with the mission of providing a high quality education to anyone, anywhere.
We have 700+ videos on YouTube covering everything from basic arithmetic and algebra to differential equations, physics, and finance which have been recorded by Salman Khan. He has also developed afree, adaptive math program available here.