[Free Registration/Login Required] On this site, Cornell University mathematics professor, Steven Strogatz, shares his 15-part series of columns on the elements of math. He investigates topics ranging from negative numbers to subtraction...

A comprehensive guide for learning all about differential equations with definitions, differential equation formulas, methods to solve them, their applications, solved examples, and practice questions.

This University of St. Andrews page offers an excellent biography on George Boole, an English mathematician and linguist (1815-1864.) Discusses his life and his contributions to these fields.