Do your homework first please! 

  Mr. C

Games

• Cramweb Math Games
• Lightning Reflex
• Mankala
• Mr L's Functional Math Games
• Wicked QuizIts - More Online Math Games
• Sudoku puzzles

More Fun Stuff...

• Math Mojo Homepage
• Mudd Math Fun Facts
• Number Gossip - Learn all about your favorite number

Puzzles

• AIMS Puzzle Corner
• Braingle.com
• Cut the Knot - Interactive Puzzles
• Diamond 16 Puzzle
• Easier Fibonacci Puzzles
• The Handley Math Page: Math Puzzles
• Jorge Rezende's Puzzle
• Math Is Fun Website
• Nick's Mathematical Puzzles
• Tim's Interactive Puzzle Solution Center
• The Ultimate Puzzle Site

Problems

• Absurd Math (pre-algebra adventure) 
• Figure This - Math Challenges for Families
• Famous Math Problems
• The Handley Math Page: Problem of the Week
• Math Forum Problems of the Week (elementary through calculus)
• Math Problem Solving Tips