- I love BetterExplained, by Kalid Azad. His passion is to help people truly understand math concepts. "Learn Right, Not Rote" and "turn Huh? to Aha!" are slogans of his that reflect the flavor of his site. Intuition is key for him. His Intuitive Arithmetic with Complex Numbers is great for precalculus students, and he has a free calculus ebook on his site. There's much, much more here.
- BrownMath is a labor of love by Stan Brown, a self-described "computer geek" who taught math for 17 years, mostly statistics at the community college level. He won me with this: "I'm against needless memorization used as a substitute for thought." 1 Besides some very well-written, good advice about learning math, his site includes two free textbooks, Stats without Tears and Trig without Tears. There are also sections about calculators and other math topics.
- Tree of Math is very well-done, and covers high school and early college math.
- One of my very favorite, easy-to-use, online math resources is the National Library of Virtual Manipulatives. Hard to believe, but it's even FREE! The NLVM is an amazing collection of Java applets that illustrate key concepts found in K-12 math. It's organized by these five math areas: Number & Operations, Algebra, Geometry, Measurement, Data Analysis & Probability. Older students who need to brush up on math skills will also benefit from the NLVM. If a picture is worth a thousand words, an interactive tool like this must be worth a million. Great for visual and kinesthetic learners. Requires certain browser and Java combinations.
- Trying to learn and do algebra without having fluent math facts is like trying to drive a car with flat tires. Reflex Math is a fun way to make your facts automatic. It's aimed at children, but the drill is effective for all ages. They have a 30-day free trial, and the annual subscription is very reasonable. Tech Powered Math has a nice review of the Reflex Math program.
- YouTube has thousands and thousands of math videos. Just search for a specific phrase, e.g. "factoring polynomials with 4 terms" or "finding derivatives using the definition." The quality varies widely. I usually look for those with the most views.
Watch this page for additions to the list. Feel free to email suggestions through the Contact Me page.
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