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Math » Number & Operations 15 Resources National Library of Virtual Manipulatives provides interactive online math lessons, activities, and assessments. Topics include... Figure This! offers interactive math problems families can use to help children understand estimation... Helping Your Child Learn Math features dozens of fun activities parents can use to help children (K-5th grade) have fun... MathDL provides Java applets, interactive modules, and Flash presentations for studying... National Science Foundation  Multiple Agencies  Education Dept  National Science Foundation    See All 15 Number & Operations Resources

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