I gave my students a take home exam over spring break. (This is normal where I teach) One of the questions was particulary difficult. It came down to a factor of three in the solution. That factor inexplicably appeared with no justification on many of their exams. I intend to have the students I suspect of cheating come to my office to solve the problem on the board. What would you do?
Edit: I gave them the Tuesday before spring break until the Thursday after. I didn’t want it to be right before or right after.
When I say normal I mean giving take home exams.
What are take-home exams even for? I’ve been a flight instructor since 2010 and I’ve never once given one. I can’t see any possible value in them.
Students’ unsupervised time is for discovery and practice. “Here are some questions. The answers are in FAR Part 91. Read the Part, answer the questions, we’ll discuss them next class.” Or, “That concludes computing wind correction angles. Here are some practice problems just like ones we’ve done in class today, take them home, work them yourselves, get comfortable with this process. Questions?”
Exams are for determining the students’ current knowledge and abilities. What ability does a take-home exam test for beyond “Can you cram for a test given a copy of the test?” Is that what you’re testing for?