Let’s face it, math is tough. But with the help of a few free online tools, you can brush up on your skills and get help on some of your more difficult problem sets.
Khan Academy
With the financial support of heavyweights like Bill Gates and Google, Salman Khan has turned his simple math video tutorials into a web institution. You’ll also find lessons in science, economics, and other subjects.
Also offered by the site is a DIY math curriculum, offering tests from basic first grade math all the way to precalculus. It rewards you for good performance and is a worthwhile tool for anyone looking to brush up on high school math or prepare for midterms.
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Wolfram Alpha
Remember your TI-83 graphing calculator? Wolfram Alpha is exactly that, but on steroids. Typing in any mathematical function will produce a graph, provide your zeros, and even compute derivatives. It also works for statistics and probability problems, so if you’ve ever wanted to know your probability of flipping 32 heads in a row, go check it out.
