Honestly a nice enough professor with reasonable expectations and class policies. Not great, but not even near the worst class/professor I've had here. Pay attention, do the practice problems and it's pretty much a guaranteed B.

Great professor, I really enjoyed this class, It was super easy homework-wise and also very interesting. He's a great guy and you can tell he enjoys teaching the subject. Take this class!

I respect his expertise in genetics, but I feel like he does not know how to teach this knowledge to students and/or make lectures exciting. Many of my peers who attend lectures also agree his many of his problem explanations are confusing. However, I appreciate the additional practice problems he provided and his occasional quiz hints.

He is nice enough and wants people to succeed, and I thought his tests were reasonable for the most part. They are very similar to the practice. His lectures are a bit all over the place, I feel like he would mention something once and it would show up on an exam. He made the class total the average of the top 10 scores. A bit condescending though.

Professor Christoffersen has been my favorite professor here at UCSB! MCDB28 is a great class with no midterm or final exams. We do weekly quizzes and have two short essays that get peer-reviewed and revised. He is a really amazing guy, super sweet and funny! I took this class for fun since it doesn't go towards my major, and I am SOOO glad I did!!

Christoffersen's lectures were nowhere near amazing, but he provides resources like extra practice problems to help students succeed on his portion of the final. Once you do all of the practice, the problems are not that difficult, so don't be discouraged if you don't understand anything after his lectures. Also, utilize CLAS.

Genetics is a hard part of the MCDB 1A class, so expect to do a lot of practice problems. He is accessible in office hours, and if you ask questions he will make the effort to work it out or show why something is going wrong. Know that you have to work, but you can really use him to your advantage to do well in the class. Fat curve btw

He made everything so easily able to be understood- technically attendance was mandatory but he would give credit if you watched the online lecture. Small assignments every week but done in class and 2 paper assignments.

I took MCDB 28 and genuinely loved it. The lecture slides are not super interesting in my opinion but Rolf conducts really great and thought-provoking class discussions. He’s really funny, clearly super smart, and it wasn’t hard to get a good grade.

I took MCDB 28. As a non-stem major and someone who hates math & science, I loved this class. There was no math involved and he makes confusing scientific concepts extremely digestible. He's an easy grader. Discussions and questions are always encouraged. Its an extremely manageable class and he goes over extremely interesting genetic topics.

The material wasn't that difficult but the way he went about explaining it made it harder than it needed to be. I was able to decipher his lectures because of high school AP Bio, but my friends who did not take that class struggled. He had many iClicker questions that most of the class would get wrong, which I think shows he couldn't explain well.

He's been a genetic professor for several decades so I feel like he's just disconnected from being able to teach something to students that do not have a background in genetics. It's like he doesn't know what it's like to not know what's going on. All explanations he gave were matter of fact statements. Does not teach.