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Quickfound.net's YouTube channel features documentary, educational & training
films which have been improved with both audio and video noise reduction. 
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Mathematics Search: The American Mathematical Society MathSciNet search engine finds math info in almost 2.5 million documents on Englishlanguage mathematics. Math Forum has a searchable collection of math education resources for K12 and higher education, an Internet Math Library, plus a newsletter, discussion forums, the problem of the week, and "Ask Dr. Math". UTK Math Archives is a searchable collection of math resources for education, plus math software and links. The MacTutor History of Mathematics Archive from the University of St. Andrews. Cut the Knot is a popular recreational math site with problems, puzzles, articles and java applets. Vassar Stats provides free online statistical processing. Users can type in numbers or import data from a spreadsheet. Functions include linear regression, analysis of variance, and the MannWhitney, chi square, and other tests. WISE Statistical Applet Links lists free java applets that perform various statistical functions. The Pi Pages are all about pi, 3.14159..., including pi links. From Simon Fraser U. Also see The Joy of Pi. The Prime Pages are all about prime numbers, including Mersenne primes. 38 Mersenne primes (2 to the nth power, minus one, equals a prime number) have been discovered, the largest being 6,972,593. This site has info including history, theorems, and proofs, and rewards for finding new primes. The Online Encyclopedia of Integer Sequences was wired to you by AT&T, but now is run by the OEIS Foundation. Random Numbers has a tutorial on random numbers and research methods, and a online 'random' number generator. HotBits Random Numbers, based in Switzerland, generates random numbers from a geiger counter measuring the radioactive decay of krypton85. Random.org generates random numbers by a more "traditional" method, from noise in radio reception. The Geometry Center, the Center for the Computation and Visualization of Geometric Structures, provides graphics and java applets that illustrate geometric math, such as a pinball game in negatively curved space, as well as articles, and more. Virtual Polyhedra are 3D images of over 1000 polyhedra. Knot Plot covers the mathematics of knots (topology), with a primer on knot theory, pictures, animations, and links to other knot sites. Chaos Hypertextbook is a primer on chaos and nonlinear dynamics, with links. Infinite Fractal Loop is a "web ring dedicated to fractal art", with links to over 70 fractal art sites (some have those awful mandelbrots, too). Primordial Soup Kitchen is about the math of cellular automata, with images and java applets. 
