One of my previous managers would set up the white board interview for a candidate by giving them a simple problem application (not a course-grading system but

One of my previous managers would set up the white board interview for a candidate by giving them a simple problem application (not a course-grading system but similar) to draft out on the whiteboard an initial design. Then they would add in additional details/requirements in about three stages. So the candidate at some point would typically have to back track and revise some of their initial design to accommodate the new requirements. It was a good measure of how well they communicated, how they dealt with undoing some of their prior work, and the process was fairly representative of the type of work involved in the position.