If you're a mathematics educator, you'll find the GeoGebra site to be a perfect addition to your stable of online resources. On the top of the homepage, visitors can look through sections that include About, Download, Community, and Materials. Most visitors will want to download the GeoGebra application as it is the primary way to utilize the 44,000 learning activities offered on the site. After...

Designed and maintained by Elizabeth Stapel, an educator and holder of an advanced degree in mathematics, Purplemath contains hundreds of lessons designed to help students who might be having trouble with algebra. As Stapel notes on the site’s homepage, “These lessons emphasize the practicalities rather than the technicalities, demonstrating dependable techniques, warning of likely “trick”...

The Matrix Market website, provided by the National Institute of Standards and Technology, is "a visual repository of test data for use in comparative studies of algorithms for numerical linear algebra." The repository includes about 500 sparse matrices from a variety of applications, along with matrix generation tools and services. Visitors can scan the top ten or browse the repository by...