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RANDOM.ORG offers true random numbers to anyone on the Internet. The randomness comes from atmospheric noise, which for many purposes is better than the pseudo-random number algorithms typically used in computer programs.

Math help since 1998. Math Goodies helps kids at all levels with interactive instruction and free resources. Get help online or offline.

Research Randomizer -- A Free Tool for Instant Random Sampling and Assignment.

Psychic Science - free educational-entertainment resources for psychical research, parapsychology and mind magic, including ESP tests and psychic games

Random Number Generator provides free, custom random numbers for the lottery or games. Get lucky in Lotto with RandomNumbergenerator.com

GraphPad Prism is a powerful combination of biostatistics, curve fitting (nonlinear regression) and scientific graphing in one comprehensive program. Easily organize, analyze and graph repeated experiments; pick appropriate statistical tests and inte...

User-friendly introduction to statistics, probability, and survey sampling. Free, online tutorials - a general statistics tutorial and a tutorial tailored to the Advanced Placement (AP) Statistics curriculum. Online tools - statistical tables, probab...

HowStuffWorks explains hundreds of subjects, from car engines to lock-picking to ESP, using clear language and tons of illustrations. We do the resear

High school level mathematics and computer programming lessons, activities and resources that are fun and challenging. Materials for students, parents and teachers.