Online Resources for Math

• Math League: math contests, grades 4-12
• MathFax:  math contests, grades 3-12
• Math.com:  the math world online
• Metric Conversion Tools: online calculators for metric conversion
• Math Fact Cafe: Create worksheets, print site-created worksheets
• Virtual Manipulatives from McGraw Hill
• Calc101.com:  step by step derivatives and integrals, each step explained; long multiplication, division of polynomials
• Dataplot: statistical software, especially for linear and multilinear regression, nonlinear modeling, related diagnostics; from National Institue of Standards and Technology
• Fractint: generates pretty fractals, deep zooming

Do you know of other online resources for math? Leave a comment below.