Math Resources

WolframAlpha

Like Google, but for math. Type in an equation (even using plain english words) and it will show you solutions and steps. It has hundreds of other surpising features as well.

WolframAlpha's brains are very advanced and are capable of performing complex mathematical operations. I'm always impressed with its capabilities.

If you need extra practice is almost any math topic you can use their free problem generator.

Geogebra

Free online and downloadable geometry playground. You can graph equations, draw mathematically precice shapes, create 2d mechanical objects even. 

I use it for demonstrating topics while tutoring, and I have used it on my YouTube channel.

Khan Academy

The holy grail of online math youtube videos (and MANY other subjects). It started as a youtube channel for one man to help his nephew with math across the country. And it blossomed into an immense library of knowledge. 

Their platform also gives students example problems and tracks learning progress.

Official SAT practice through Khan Academy!