Average English Class Size

My recently polled visitors on the average class size of English classes in their high schools, and interestingly enough, 37% of classes average over 30 students. In fact, 11% of classes have more than 50 students. The question I have is to what extent this has an impact of learning and ideas on what teachers can do to improve learning despite the numbers. In other words, teachers have little choice as to the numbers of students in their classes, so what can they do in such situations? Share your ideas.

Randall