In all, there are 33 courses at Colorado with 400 students or more. Three have more than 1,200. Most are broken into sections, but even those may have hundreds of students. One chemistry course is so big that the only place on campus where everyone can take the final exam at once is the Coors Event Center, Colorado's basketball arena.
Such arrangements are here to stay on U.S. campuses.
1200 students? Even "only" 400? At that point, why not just conduct the classes online?