How big are the classes? I am guessing the class size goes down as you progress in your major.
How big are introductory classes in biology, chemistry, math, etc. including Calc. 2?
I can only speak for what my daughter has told me about her engineering classes. Chemistry, Physics and Calc 1 were all larger classes with 120-200 students but they all have a recitation class that meets 1-2x per week. The recitation classes are smaller and usually around 30 students. Definitely helps make it seem a bit smaller.
As the classes get more specific to your major they do tend to get smaller. Hope this helps.