While a grad student at TX A&M CS, I rolled out a grading rubric (for a couple of intro courses) which required the students to pass individually each of the homework, quiz, and exams, separately, to pass the course.
This nipped HW cheating in the bud by the 3rd semester, because the students knew that you couldn’t game the system by maximizing HW grades to bring up exam & quiz grades. Exams & quizzes were autogenerated from a set of parametric problems, and put in random order on the print out — made side-by-side and answer-sheet cheating basically impossible.
Faculty weren’t as charmed with the cratered grades, though.
This nipped HW cheating in the bud by the 3rd semester, because the students knew that you couldn’t game the system by maximizing HW grades to bring up exam & quiz grades. Exams & quizzes were autogenerated from a set of parametric problems, and put in random order on the print out — made side-by-side and answer-sheet cheating basically impossible.
Faculty weren’t as charmed with the cratered grades, though.