Description: QuickMath allows students to get instant solutions to all kinds of math problems, from algebra and equation solving right through to calculus and matrices.
Description: Interactive chess problem database and community. Solve chess problems through a Java applet, add new problems, search, comment, and more.
Title: Play Sudoku Online Print Sudoku, Free Puzzles, & Solver
Description: Play Sudoku Print Online Puzzles 9x9 16x16 25x25 Easy, Medium & Hard levels, Download or Print Su-doku, pdf or Jpeg, Sudoku solver games & puzzles