Other
Foundation for Critical Thinking: Elemental Structure for Analytical Thinking
Dissect the eight elements identified which make up the human thought process. Everyone thinks and everyone follows this course to produce thoughts.
Other
Mystery Master: Logic Puzzles
Find several logic puzzle ranging from "very easy" to "very challenging."
Ducksters
Ducksters: Kid's Games: Rules of Checkers
Kids learn the basic rules and strategy of the game of checkers on this site.