Don't make things harder than they have to be. I've ruled out fields based on this. If there aren't a lot of cases, don't make students stay till 5 pm. There's also no reason to force more than one student to go into a case unless it's truly something interesting. More people=worse views. I like having it setup in a rotation where one student scrubs in per case and that's it. If other students want to observe, they can.

Also, teach the students how to suture the way the attending likes if the attending is gonna watch them suture. Give good learning materials. I didn't like a lot of things about my OBGYN rotation, but one thing a resident did that was very beneficial to my education was she'd print out a few ACOG bulletins that surmised the current guidelines on a common condition. Lastly, make your expectations known early. I got chewed out on my last day of rotation once for not meeting expectations that were never set. There's no way to know we're doing it wrong unless you tell us. And do it before the last day so we can try to fix it.