Professor Campbell was a good physics teacher. He did his best to explain mechanics, and I believe he did his tests in a fair way (particularly since I did well). He gave out extremely hard tests, where the average might be a 40%. If you knew the material, or had this knack for mechanics, then you could easily get an A. I consistently scored above the average, but not outstanding, and I did well.
I feel like his lectures weren't particularly good, as he tried to explain all of the topics in 10 weeks, but ultimately it comes down to you either learning the material on your own as well as you can or having a knack or physics.

Only a quarter after I've taken him do I realize how much I liked his class. He's always helpful and willing to answer questions patiently. His midterms aren't too difficult, but his final blew everyone out of the water. There was one question that I would be surprised if anyone got above 20% on it. The highest score on the final was a 67%, and the average was a 47%, if I recall correctly. Don't be arrogant and skip lectures. What he discusses is important.

Professor Campbell was overall a good professor for Physics 1A (probably better than the overrated Corbin). He was very direct and clear about what physics we needed to know and he explained and derived physics very clearly. The class was built around a 33/33/33 A/B/C and lower curve, but I felt that Campbell was very generous with the grades that he gave out considering that I got below average on all 3 exams. His exams are way harder than the practice exams from previous years exams that he uploads to CCLE and there is really no way to study effectively for the exams outside of doing the old midterms and going to lecture. One of the more disappointing parts about the class was his use of the BS Mastering Physics program which does not further the understanding of physics and does not help at all for the exams. Overall I would rate him a 7/10 and I would recommend him over other 1A professors. Good luck on his hard tests though.

I loved having Prof. Campbell for mechanical physics. He is a young guy that interacts very well with students. I thought he gave some good lectures, but you can expect to fall asleep a couple times in his class. Some people love that he gives massively curved tests (the average on the first midterm was a 37%) and others don't. He is generous with the curve though to make sure that people succeed and learn something in his class. Would definitely recommend him to anyone.