Wow. No, ours are all 20-ish here. When it gets around 24, they start looking at splitting off with another teacher. Of course, we are a pretty small school in a pretty small town -- graduating class is usually 35-40. The elementary is all two or three classes per grade, depending on the number of kids in the grade. The teachers rearrange to meet the demands of each new grade -- my daughter's second-grade teacher is moving up with the class to third, because this year's third grade was only two classrooms and hers will be three. Her classroom was 19 this year.