Cool Math For Kids - an amusement park of math and more! http://www.coolmath4kids.com/
Internet4Classrooms - Elementary Math Page. This site has tons of math activities for both teachers and students http://www.internet4classrooms.com/math_elem.htm
Math Games (FunBrain.com)- Provides games to learn basic math for first to eighth-grade level. http://www.funbrain.com/brain/MathBrain/MathBrain.html
Elementary School Math - This site has math games and lesson plans for grades K-12 http://www.awesomelibrary.org/Classroom/Mathematics/Elementary_School_Math/Elementary_School_Math.html