Teens don’t have to find math boring or repetitious.
Short videos for visual learners on math subjects ranging from Algebra through Calculus. Answer section allows you to ask the math teachers questions and get answers.
Coolmath.com Math Lessons
Beautifully illustrated lessons in Algebra, Geometry, Trig and Calculus.
Have a K-12 math question? Ask Dr. Math! Lots of interesting answers there already, too.
Interactive Mathematics Miscellany and Puzzles
Learning starts from wondering, and another purpose of this site is to serve as a resource for things, simple but curious, related to Mathematics.
Free lessons in YouTube format in all sorts of levels of math and other topics. Signing up holds you place over time during a course.
Need to get or receive help with higher math? As well as having loads of information, this site also has a message board and (get this!) a White Board for drawing out math problems that you couldn’t just type.
Math is Fun
Many early teens’ math concepts explained in easy language, plus puzzles, games and worksheets. Great for those who just need math made more visual and interactive. Has moderated forum for asking math questions or sharing good math help sites.
Videos on each high school math topic (Basic Math, Algebra, Trig and Calculus) by a math teacher and several of his teen students, one explains in Spanish.
Professor Freedman’s Math Help
This site provides information about basic math and algebra and specifically addresses the needs of the older student with math anxiety, including the Student’s Math Anxiety Bill of Rights.
A study guide by Peter Alfeld, written for those struggling with higher math.
Webmath Real World Math
Learn some practical math such as figuring out sale prices, loan interest, unit conversions, and even your weight on other planets.
History of Math
Math’s Hidden Woman
Following is the true story of Sophie Germain, an 18th-century woman who assumed a man’s identity in order to pursue her passion — attempting to prove Fermat’s Last Theorem.