Online science mysteries for classroom use that encourage problem solving and inquiry.

K-12 online interactive learning center with thinking games, logic puzzles and quizzes.

Over 30 games including math baseball, the plural girls, and math car racing.  Research tools are available for teachers, as well as automatically scored on-line quizzes.

Offers options for creating different forms of puzzles to solve.

The intent of the project is to provide motivation for students to use computer technology while increasing problem-solving strategies and communications skills.

Critical thinking games and trivia, crosswords, riddles, word games, etc.

These are stories with "holes."  In the game of situation puzzles, a mysterious situation is presented to a group of players, who must then try to find out what's going on by asking further questions. The person who initially presented the situation can only answer "yes" or "no" to questions (or occasionally "irrelevant"). The answers are provided.

WebQuest search page.

All Madison elementary schools use this math textbook program.  2 brain teasers per math chapter are provided at this site. 

This site has brain teasers and test prep according to each chapter in the textbook.

Sudoku rewards applied logic. It encourages you to apply principles of deduction and induction. It sharpens your powers of concentration and reasoning.