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Math » Number & Operations

See Featured 15 Resources
Helping Your Child Learn Math features dozens of fun activities parents can use to help children (K-5th grade) have fun learning geometry, algebra, measurement, statistics, probability and other important...  (Department of Education)
Math Forum provides high-quality math education content. The site features a problem of the week for students in grades 3-12, collections of math resources grouped by subject and grade level...  (Drexel University, supported by National Science Foundation)
MathTools offers hundreds of online tools, lesson plans, and learning activities for teaching and learning math—currently for grades 2 and 7 and precalculus. Tools are offered for studying...  (MathForum, supported by National Science Foundation)
Exploratorium Online features dozens of online learning activities and exhibits. Make a mold terrarium, pinhole projector, telescope, or hair hygrometer. Explore the brain, biodiversity, Antarctica, DNA...  (National Science Foundation)
MathDL provides Java applets, interactive modules, and Flash presentations for studying numerical and graphical solutions of differential equations, parametric representations of curves, the...  (The Mathematics Association of America, supported by National Science Foundation)
Mathematics Across the Curriculum features an "electronic bookshelf" of materials for teaching math in art, history, literature, and music, as well as science, engineering, and other disciplines traditionally...  (MATC Dartmouth College, supported by National Science Foundation)
National Science Digital Library provides access to resources in science, technology, engineering, and mathematics education and research. From video clips teaching cell division to simulations demonstrating plate...  (National Science Foundation)
National Library of Virtual Manipulatives provides interactive online math lessons, activities, and assessments. Topics include fractions, functions, geometric transformations, integer arithmetic, patterns and sequences...  (Utah State University, supported by National Science Foundation)
InterMath is designed to help middle school teachers deepen their understanding of math concepts. More than 200 "recommended investigations" are offered for teachers to solve and then modify...  (University of Georgia, supported by National Science Foundation)
Journal of Online Mathematics and its Applications offers articles, learning modules, "mathlets" (single-purpose learning tools), reviews of online resources, and a developers' area. Search contents of the journal by type of resource...  (Mathematical Association of America, supported by National Science Foundation)
Figure This! offers interactive math problems families can use to help children understand estimation, volume, and other important mathematical concepts...  (Multiple Agencies)
CryptoKids®: America's Future Codemakers & Codebreakers explores the making and breaking of codes. Read declassified top secret documents (Korean War, Kennedy assassination, Cuban Missile Crisis). Discover the history of codebreaking. Solve...  (National Security Agency)
Collected Learning Units in Mathematics provides more than 200 instructional units in arithmetic, algebra, calculus, data analysis, fractions, geometry, number theory, pre-algebra, pre-calculus, probability, statistics, and...  (National Security Agency)
Mixing in Math offers 40 activities that can be used to "slip a little math" into kids' everyday routines. Activities include using clocks and calendars, figuring lengths and widths, gathering and...  (TERC, supported by National Science Foundation)
Balanced Assessment offers over 300 mathematics assessment tasks for grades K-12. Topics and activities include averages, addition, area, batting orders, bicycle rides, chance of rain, chance of...  (The Concord Consortium, supported by National Science Foundation)

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