Cool Math 4 Kids: Online math games for reinforcing skills with addition, subtraction, multiplication, division, fractions, decimals, etc. Contains a link to coolmath.com for older students and a 3 – 5 yr old section. http://www.coolmath4kids.com/
Funbrain: Games for math & reading, games grouped & searchable by grade level. http://www.funbrain.com/
Fun 4 the Brain: Games for addition, subtractions, multiplication, division, science and just for fun. http://www.fun4thebrain.com/
Gamequarium: Interactive mathematics games, virtual manipulatives, online calculators, and graphing tools. http://gamequarium.org/math.htm
Harcourt Math Glossary: Interactive math glossary for students in K-6 that provides a searchable database of math terms, accompanied by illustrations and animated examples. http://www.hbschool.com/glossary/math2/index.html
Illuminations - Weblinks: Search 724 web links for games and information for number sense, algebra, geometry, measurement, data analysis and probability. http://illuminations.nctm.org/Weblinks.aspx
Illuminations - Activities: Search 105 math activities online based upon grade spans. http://illuminations.nctm.org/ActivitySearch.aspx
Internet 4 Classrooms: Contains various math games and activities. http://www.internet4classrooms.com
Mathematics Benchmarks, Grades K–12: Benchmarks for K-12, as well as models of secondary school courses, sample secondary school assessments, and tasks. http://www.utdanacenter.org/k12mathbenchmarks/
Math123xyz.com: Interactive multimedia math resources, including math lessons, interactive tutorials, learning tools, enrichment, and extra practice. Basic Skills, Pre-Algebra, Geometry, Algebra, and Trigonometry. http://math123xyz.com/
Math Dictionary for Kids: More than 600 interactive mathematical definitions for elementary school students. http://www.amathsdictionaryforkids.com/
Math Playground: Play logic games, solve word problems, and watch math videos. http://www.mathplayground.com/
Mathwire.com: Activities, worksheets, and creative ideas for teaching math that are classroom-tested by teachers. Based on NCTM Standards. http://www.mathwire.com/
National Library of Virtual Manipulatives: Interactive manipulatives to use. For example: access a spinner, make a graph, etc. http://www.nlvm.usu.edu
Numbers Made Meaningful: Teacher-tested math stories and games based on the story Trouble with Zero, for PreK through grade 1. http://www.numbersmademeaningful.com/
Rockin’ the Standards: A veteran elementary school teacher and his rock band have taken lyrics from common tunes and changed them to help kids remember the mathematics they’ve been taught in school. http://www.rockinthestandards.com/site/
Soft Schools: Worksheets and games. http://www.softschools.com/
Superkids: Online resource for teachers or parents to create math worksheets on topics including addition, exponents, and telling time. http://superkids.com/aweb/tools/math/
Time Monsters: Interactive online lessons and quizzes about time. http://www.timemonsters.com/
Mr. Nussbaum's Math Site: Math games grouped by concept