Mathworld, hosted and sponsored by Wolfram Research, Inc., is an online mathematics encyclopedia intended for students, educators, math enthusiasts, and researchers. This amazing resource was compiled over 12 years by...

It's hard to believe it's all free! This trove of information from thefreedictionary.com offers all sorts of information on math. From algebra and integers to derivatives and polynomials, it's all here. By scrolling over...

Back in the late 1990s, the Scout Report first reported on this site, which was a collection of useful mathematics resources intended to serve both students interested in college-level mathematics and their teachers....

Linked essay on architecture and mathematics as the study of patterns. With references and other related web sites.

Original Web-based activities developed by Thirteen Ed Online Master Teachers. Each lesson consists of an overview with learning objectives, procedures for teachers, and "organizers" for students -- hand-outs,...

A unit that begins with a historical development of pi and proceeds with examples of activities to help students develop a deeper appreciation of the mathematical beauty and value of pi.

The development of geometry, from the very first experiences that man might have had with shape through a period in ancient Greek history. The life of one famous mathematician of this period, Pythagoras, is spotlighted...

Calculus may seem to be quite dismal to some, but it comes alive through the fine work of Gabriela R. Sanchis. Sanchis wrote this excellent piece on teaching calculus by drawing on the historical evolution of some of its...

Excerpts/quotes explaining Gödel's Incompleteness Theorem: any logical system contains a true statement that cannot be proven using that system's rules.

This website focuses on “magic squares” and their mathematical significance. Magic squares received their name because there are so many relationships between the sums of the numbers filling the squares. Students can...