Addition and subtraction facts are a universal challenge for the students I tutor. The dodecahedron math facts model has been one of their favorite "help" tools.It is simple to fold and assemble. However, if you get stuck, please email me, and I will help. There are also some good YouTube videos showing how to assemble the pieces.You can use it as a simple reference tool or have your kids make up games with it. Their imaginations are great when presented with a new "toy."By using tools like this