- Illuminations activities, 96 online activities (as of August 2007).
- EconEdLink, from the National Council on Economic Education.
- math archives K-12 software sites, contains MS-DOS, Windows, Mac, and Linus software programs that support math education.
- MathTools.org, a project of The Math Forum @ Drexel, funded in part by the National Science Foundation and the National Science Digital Library.
- FigureThis, sponsored by the National Council of Teachers of Mathematics, the National Action Council for Minorities in Engineering, Widmeyer Communications, and the Learning First Alliance.
- Interactive games and math magician games, from the Oswego City School District.
- High School Math Resources for Students & Teachers, from Columbia North High School GED Online Diploma. Thanks to Ms Kimberly McKnight and her students for suggesting this web site.
The following sites may contain good content, but their sponsorhip is unknown or it's international.
- AAA Math, contains interactive arithmetic lessons for grades K-8.
- actionscript 3 tutorials
- BBC Education game wheel, also has worksheets called printoffs.
- Math Cats games.
The following sites may contain good content, but their sponsorhip is for-profit or unknown.
- CountOn.org, has games and other resources.
- Math Goodies, a for-profit company that provides some sample lessons, worksheets, and homework help online.
- APlusMath.com, sponsored by other math-based web-sites; provides flashcards, a game room, homework helper, and worksheets.
- MathStories.com , a for-profit company that provides math word problems on a subscription basis.
- FunBrain Math Arcade, from Pearson Education, Inc.
- MathPlayground.com, contains word problems, math games, and logic games.