This is a "fun" way for students to get familiar with the math vocabulary they should know before the ISAT or any standardized test. I give two versions of the crossword puzzle, but each has all of the same words. It was made in two versions so I didn't have groups of students just copying.
I let each student choose one partner to work with and gave them the same version, and gave the students sitting near them the other version. Very few students caught on that it was the same crossword puzzle, just flipped! The ones who did caught on at the end.