<p>To re-cap, the average class size distributions (as reported in the Common Data Sets) seem to suggest big differences between most of the Ivies and the “public Ivies”. Examples:</p>
<p>School … % < 20, % >=50 students
Columbia … 80.7%, 7.1%
Harvard … 78%, 8.1%
Penn … 71.5%, 8.6%</p>
<p>Berkeley … 64.2%,14.2%
Michigan … 48%, 16.8%
Wisconsin … 43.9%, 19.8%</p>
<p>However, when you look closely at introductory classes for popular majors (100-level, 200-level bio,chem,econ,polsci,psych) it appears that many of them (at both the public & private schools) enroll more than 100 students. I suspect this would be true for most pre-med courses at both public and private research universities.</p>
<p>At the public Ivies, big seems to get much bigger. I’ve noted lecture classes with over 1000 students at Wisconsin and many with 300 or more at Berkeley. That does not appear to happen so often at Princeton. But then, once you get beyond “mid sized” (50 or more?), the effects of this difference may be more psychological than pedagogical. The break-out sections appear to be somewhat smaller at Princeton (but I don’t know how consistent or significant this difference is across all the Ivies v. public Ivies). </p>
<p>It is hard to tease out the difference in exposure to professors v. TAs. Both the Ivies and the public Ivies use grad student TAs to lead the sections for large classes. Princeton, at least, has professors (sometimes distinguished full professors) teaching many freshman seminars. Harvard embeds senior faculty into residential life as House Masters. At these and other Ivies, I don’t think the prevailing attitude is that it’s a “waste of resources” to expose freshmen to senior faculty. But how effectively do the Ivies v. public Ivies v. LACs deliver good teaching in their many small to mid-sized classes? That is quite hard to assess and document.</p>