20 Wins

I first heard about "20 wins" from a math professor at UNLV and have used this math strategy game every year with my students.

The essential premise is students play using the digits (0-9) and try to make 20 with any four connecting corner boxes.  They can use any operation.

I modeled with my students (me against them):

Before l let them loose!  

They loved it!

You can download one here for your students!  I included extension suggestions!