Project MATHEMATICS! videos explore basic topics in high school mathematics in ways that cannot be done at the chalkboard or in a textbook. They bring mathematics to life with imaginative computer animation, live action, music, special effects, and a sense of humor.
Young people are attracted to mathematics through high-quality instructional modules that show mathematics to be understandable, exciting, and eminently worthwhile. Each module consists of a video together with a workbook/study guide, and explores a basic topic in mathematics that can be integrated into any high school or community college curriculum. The modules encourage interaction between students and teachers.
Available titles does not relate to very complicate mathematic but can be helpful for young students. (The Theorem of Pythagoras, sines, polynomials, ...)
http://www.projectmathematics.com/