Utilizing dynamic models to explain different aspects of geometry can be a powerful pedagogical tool. This is exactly what inspired Eduardo Veloso and Rita Bastos to write this classroom exercise for the Mathematical Association of America's "Convergence" site. In this exercise, mathematics educators will receive an introduction to several key aspects of the history of geometry through four...

Formerly TeacherNet, Essential Learning Products caters to the educational resource needs of K-8 educators, and is certainly one that is worth taking some time to browse through. Developed by the Highlights educational products group, the site contains opportunities for educators to join various discussion lists, classroom resources (such as lesson plans), and links to the webpages of various...

As mathematics teacher and learning coach Andrew Stadel explains, problems can help mathematicians develop their number sense and problem solving skills. Stadel has created Estimation 180, a compilation of classroom activities and lesson plans that center on the skill of estimation. The name of the site comes from the 180 short estimation problems (one for each day of the school year) that are at...

You've probably been to a playground, but have you been to the Geometry Playground? It's just as much fun, and it may change the way you think about geometry. Created by the good folks at the Exploratorium in San Francisco, this exhibit is meant to complement the traveling exhibit which has been featured in other science museums around the United States. The exhibit here contains three sections:...

Throughout history, there have been many famous curves. In this case, the famous curves profiled here have names such as rhodonea, right strophoid, and the Kampyle of Eudoxus. These curves belong to the world of the mathematical sciences, and they are offered up for teachers and the generally curious by the staff at the School of Mathematics and Statistics at the University of St. Andrews....

While some may know fractals primarily from their use in abstract painting and African art, fractals are important elements within the world of mathematics. For those who seek to learn more about the construction of fractals and their uses, this very nice Flash-enabled feature from Daniel Gries at Merrimack College will definitely come in handy. This particular Flash applet draws fractals by means...

This is one of the best online resources about fractals, and is "meant to support a first course in fractal geometry for students without especially strong mathematical preparation." The site is incredibly deep, providing everything from the most basic definitions and non-technical discussions to involved mathematical formulations. Interactive Java applets, downloadable software for the PC and...

Discussing functions can be a tricky endeavor, but having a handy interactive way to talk about functions can relieve a great deal of stress. As part of the Mathematical Sciences Digital Library, this Functions Grapher application is designed to let users enter one or two functions. After doing so, users can trace along either one with coordinates shown dynamically changing at all times. The...

Economics professor, Ariel Rubinstein, created this website to provide teachers some basic instruction in Game Theory along with "free user-friendly didactic tools for conducting web-based thought experiments." The materials are based on his experience in teaching a course in Game Theory using web-based experiments during the years 1988 to 1999. Sample problems are available in five languages:...

Goodwill Industries and the Goodwill Community Foundation (GCF) offers this series of free online tutorials related to math skills including basic operations, fractions, decimals, percentages, and basic algebra. These resources may especially appeal to teachers and tutors who work with elementary and middle school level students as well as Adult Basic Education (ABE) learners. Each tutorial uses...