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Website
National Council of Teachers of Mathematics

The Math Forum: Student Center

For Students 9th - 10th
The Math Forum Student Center provides math news, notes, challenges, and much more. Dr. Math is here with the answers to students' math questions. There's a teachers' section, a research division, and a parents' part. This site also...
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Other

Mathematics Computation

For Teachers 3rd - 8th
This site gives you math worksheets to save the teacher time and keep the students learning.