There are a number of websites that will let you make crossword puzzles for free. (Unfortunately, many are not compatible with Apple/Mac computers.) And there are a number of software programs you can buy as well. (Again, many are not compatible with Apple/Mac.)
But if you want to make nice-looking crosswords that you can manipulate as you wish, without paying for the privilege, this PDF will tell you how. It takes a little time, but if you are going to use the same crossword puzzle over and over, for multiple classes, it’s worth the time. (And it’s fun to do!)
Click here for the PDF:  Making Crosswords PDF