HEATKEYS

Purplemath contains practical algebra lessons demonstrating useful techniques and pointing out common errors. Lessons are written with the struggling student in mind, and stress the practicalites over the technicalities. Links and other resources als...

Free analytical and interactive math, calculus, geometry and trigonometry tutorials and problems with solutions. Thousands of problems and examples with detailed solutions and answers are included in this site. Also explore topics in mathematics usin...

MathWorks is the world’s leading developer of technical computing software for engineers and scientists in industry, government, and education

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...

Tuts+ teaches creative and technical skills across many topics to millions of people worldwide. We offer tutorials, articles, news and insights that help you take your knowledge to the next level.

Engineered Software, Inc. We sell a line of statistical software that has been engineered to be easy to use.

An R introduction to statistics that explains basic R concepts and illustrates with statistics textbook homework exercises.

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

OriginLab produces professional graphing and data analysis software for scientists and engineers. Our products are designed to be easy-to-use, yet have the power and versatility to provide for the most demanding user.