Resources and Tools for Elementary Math Specialists and Teachers

Have your students tried Ken-Ken?

This discussion is part of a collection:Interactive Puzzles

In the ML Interactive Puzzle collection you will find a link to Illuminations Ken-Ken offerings. They are understandably not too difficult, that is, after you catch on. NYTimes online offers a wider range as does ken-ken.com. After Sudoku this might be the next puzzle craze, or do you have a different form to recommend?