Once in a while we all encounter a student who just does not "get it", not matter what. What approach do you take with a student who clearly has not understood the subject matter, and keeps on asking the same questions over and over after you have offered several explanations? In the meantime, other students find these questions annoying, if not ridiculous. Do you offer to continue explanations after class? Sometimes my students would attempt to re-explain, but not always does it work. I do not want to discourage the student, but at the same time, I cannot focus on this one student when everybody else has obviously mastered the subject matter. Please, share!