Not too easy. Not too difficult.
The courses at UNC are great. They can be very challenging, but I think for the most part I've learned a lot. I have had some AMAZING professors in my short time. I only have one professor that.
Classes can be large, but you can still be a part of the class. The professor I got to know the best my first semester actually taught my 450 person bio class. Like even with the class sizes, you can still get to know the professors just by going to office hours.
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Advice for students:
I just strongly disliked, but for the most part my professors are always able to help out. Most of the time I don't even go to them about the curriculum; I go to get advice about doing research and applying to summer research programs, and just to get to know the professors.