A wise professor I knew always scheduled a one-on-one research meeting directly at the end of office hours.
If office hours was an hour long, students come and go for an hour with questions plus some overtime duration of extra clarifications. If office hours was four hours long, students come and go for four hours plus the same bit of overtime. With no bookend between office hours and everything else, students would beg for one more question and push the boundaries of the open-door policy.
In their eyes, the instructor who slams the door in the student's face because, "It's two o'clock, I need to work," is impolite and insensitive.
Putting an unavoidable, important meeting at the end of office hours suddenly put the burden of being impolite on the students. Suddenly, office hours became more efficient and students, more punctual. The professor was no longer so unbelievable cruel for ending the open-door session (gasp) on time. And, most importantly, research could get done at a normal hour.
If office hours was an hour long, students come and go for an hour with questions plus some overtime duration of extra clarifications. If office hours was four hours long, students come and go for four hours plus the same bit of overtime. With no bookend between office hours and everything else, students would beg for one more question and push the boundaries of the open-door policy.
In their eyes, the instructor who slams the door in the student's face because, "It's two o'clock, I need to work," is impolite and insensitive.
Putting an unavoidable, important meeting at the end of office hours suddenly put the burden of being impolite on the students. Suddenly, office hours became more efficient and students, more punctual. The professor was no longer so unbelievable cruel for ending the open-door session (gasp) on time. And, most importantly, research could get done at a normal hour.