Skills help for K-8 students
Every Day Math resources K-5
Soft School K-8 includes French and Spanish, traditional worksheets, quizzes
Math Forum all things math including Ask Dr. Math
Hoodamath Academic Math Games grades K-12
Aunty Math challenges for K-5 learners
Cool Math Comprehensive math site
Math Humor Jokes, stories, riddles, limericks
Figure This math challenges for families
Math Cats activities in an interactive blackboard style
M.C. Escher Mathematics of art
Fractal Art Gallery Arguably the most beautiful fractal gallery in the world with more than 700 fractals
Fractals for elementary and middle schools
Fractal geometry A Yale site
Abacus interactive math site
Absurd math Prealgebra from another dimension
Babylonian mathematics
BeatCalc Beat the Calculator (a free subscription)
Explore Math Advanced concepts
Fibonacci numbers and the golden sections
Girls go Tech (a Girl Scouts site)
How to Calculate Pi by throwing frozen hot dogs
Logical Fallacies and their proofs
Problem of the Week 4 levels of problems elementary - algebra
Numb3rs - the TV show and weekly math problems based on that week's episode's math - An excellent source for high level problems