I admit as many students as fit into my office, and talk to them together. For larger classes I have booked larger rooms so ten students can come at once. In th

I admit as many students as fit into my office, and talk to them together. For larger classes I have booked larger rooms so ten students can come at once. In those courses, often students will come to work on the homework, and ask questions as they arise, rather than coming with pre-chosen questions. Usually the students are talking to each other as much as they are talking to me. I would only admit one student at a time if I were giving individual feedback on a project, or answering questions about a take-home exam where collaboration is not allowed, or something like that.