I thought if the school requires higher Toefl score, it must be a good
school. but it is not always true, my school requires higher Toefl score
than other schools. I heard someone to explain it this way: because my
school is a private school, if someone who doesn't have enough Toefl score,
they still can get in, but they have to take ESL classes, in this way, the
school can make more money.