<p>Sac, that is definitely true of the intro bio class, which had about 200 students, most of whom were pre-med. In fact, the course was pitched to pre-med students in a way that the regular college class was not. But I do not think this quite accounts for the wealth of biology classes. It may be a combination of student interest in the life sciences in general and professors’ willingness to teach in the Extension School, which may have to do with mortgages and kids’ college tuition :)</p>