The score is the class itself, averaged across everyone who taught it. Open one for its board, which ranks every instructor on their own record in that class — the comparison a student registering is actually making. Most classes have only ever had one instructor, which is why the instructor count is printed here.

It is their average across every class they teach, so it is a way to find someone rather than a like-for-like comparison — open one for their record, where the overall carries its rank and their position on each class's own board. Instructors with no rating at all sort last and never satisfy a minimum score, because we cannot say they cleared a bar we have no reading for. A ranked board needs at least 4 records.