Rechendreieck


 * [[image:Triangle_Puzzle_Pic.png]] || These images are from a 3 page [|article] by Dr. Maria Koth which also has a student template with multiple triangles and another with one large Rechendreieck suitable for demonstration.

 Her [|webpage] has more articles and information.  If you don't read German, use Google to translate the pages. ||  fact fluency.
 * Rechendreieck are calculation triangle puzzles that encourage flexible thinking and

More links and information will follow on the German approach to fact fluency. || ||