If you want to master their situation, a single exam is not enough. I suggest you let them do some simple calculations. I couldn't see anything when I first started school, but I was very careful. Otherwise, you can choose some simple papers for them to do, so it will be stressful to put all the exams at the end of the term. It's only good for you to let them do something ~ ~ It's purely personal. If you don't like it, forget it.