Students can play using a print-out or online .
The easiest puzzles involve only addition and subtraction. The Multi-Code game, where you must use multiplication and deduction to figure out the code, is much more challenging. Another challenging puzzle is SmartSum this requires a variety of math skills to solve. This site would best be used as an opportunity for students to sharpen their skills, after they have had opportunities to develop their knowledge of the operations and of place value, and should not be considered a major part of the instructional program. However, the crosswords are fun to play and can add an interesting twist to your instructional program.