Math Crossword Puzzles
Here are some crossword puzzles for students in Grades 3-6. The letter key for all these puzzles is identical. Most of the Math expressions are single-digit multiplication and double-digit addition or subtraction. The words are names of U.S. states, Canadian provinces, countries, and major U.S. and Canadian cities.
These can be downloaded as individual PDFs and printed. There's also a solution document that can be viewed or downloaded. The solutions are in lower-case only.
All these puzzles were created at Crossword Labs, which is an excellent, reasonably-priced site for writing your own crossword puzzles.