I once spent a couple of months teaching at a for-profit tutoring centre (not in China). These were 'review' classes teaching tips and tricks to help students d

I once spent a couple of months teaching at a for-profit tutoring centre (not in China). These were 'review' classes teaching tips and tricks to help students do well on university entrance exams. I felt dirty doing it as the only students who could afford to attend were from well-off families, and I felt that the (albeit probably small) edge gained by these students might mean someone else more deserving would not be offered a uni placement.