This is a great alternative to crosswords and speak to the students who might be a bit more math-minded ;)
Students match a clue to the correct term and record the number in the correct grid at the bottom of the page.
Once all clues and answers are matched, each square on the grid will hold a number.
To check for accuracty, students can add up those numbers. Each column and row will add up to the same number (34 in this case).
If a row or a column doesn't add up to the same number, students know they must recheck their work.
The attached file deals with vocabulary from the novel Savage Mountain, but it can be easily changed to suit any topic or subject. Simply replace the terms and the clues, but keep the order of matching the same.
I have used these for novel units, geography, law, and history courses. They are also great for students with low ability or just low engagement in the course.