Loved him. Hes a passionate teacher and wants you to learn. He does iClicker quizzes every day so you have to go to class, but it's helpful! Tests are LONG! I didn't think they were hard, but you gotta be QUICK and know your stuff!! Go to lecture and CLAS, and do EVERY homework problem in the book. I ended up with 77% and got an A- after the curve.

Treat the book as your bible and you'll be fine. Gainer is a great professor, and he definitely knows his material. You'll only fully follow along to his lecture if you've done the readings ahead of time. He's also pretty attractive imo. TBH, I relied on his lectures&CLAS (yay Sarah!), then read the book later. 66% overall w the curve got me a B.

Gainer really knows the material, this is obvious as he knows how to teach it crystal clear. You MUST read the book before attending lecture, it's the only way you'll fully understand it. Online hw doesn't really compare to his tests. Test are extremely hard, do book problems and go to CLAS!!! Take Sarah for CLAS, she's the best!

Gainer is definitely a tough professor. His exams are long and difficult because they test for complete understanding of the material. Most aren't done with their exam until the very end of class. But there is homework and iclicker points to boost your grade. Also a pretty nice curve.

Class averages on the exams were between 50-60%, so they're definitely not easy. If you end up ~20% above the average, you'll get an A. Book problems are a must, but the book itself can be pretty difficult sometimes. He's crystal clear in lecture, pretty much reiterating the book more clearly. Hard, but worthwhile professor

Gainer sticks pretty closely to the book, so it is important to review material ahead of the corresponding lecture in order to fully utilize lectures. Very cute and friendly in my opinion.

I didn't like his teaching style at all and found his tests to be really difficult. There was a generous curve though. If I could take him again I wouldn't. Memorize the book to do well in his class.

Terrible lecturer. Tests are unbelievably hard. the only good thing about taking his class over bruice is the curve...

New professor. For his first time teaching (109A) he really struggled but for 109B he was awesome. You have to read the book and work out problems until you understand. Organic chemistry is not supposed to be easy; it takes a lot of work. If you put in the work, you can get an A. Don't bother emailing him, but definitely utilize office hours.

Gainer is a great professor! As long as you pay attention and don't get behind, everything he says is very clear. The midterms weren't too bad for me, but the averages were about 50%. There's A LOT of information, and the final was cumulative, long, and difficult. He curves though, and Bruice doesn't. GET THE BOOK. It's basically my bible

Gainer actually lectures unlike most professors! He makes sure students understand material. MUST READ THE BOOK (preferrably before class) and go to class notes (no powerpoints). His tests are really difficult and way too long, but there are extra points from homework and iClicker. There's also a pretty big curve because averages tend to be so low.

Not a great professor. The only good thing is this class as well as his 109A/B/C classes are really curved. If given the choice between taking the class with him or Bruice (or any other ochem professor) definitely choose the other professor, you will learn a lot more from any other professor else.

His lectures are ridiculously confusing. He is disorganized in both his material and has unacceptably sloppy handwriting. Learned everything from Sarah in CLAS. He has no enthusiasm for the subject, which makes it more dreadful. I'd recommend Bruice over him any day.

I have taken 3 classes with gainer and I think he is terrible. He lectures word for word from the book so if you don't like the book or find it confusing then you're out of luck. Also, he doesn't use powerpoint so you spend class watching him write mechs from the book. His exams were difficult seeming the class avg was 48 & 50% respectively.

Gainer is extremely nice, helpful, and fair. Lecture itself is pretty dull and not as helpful as reading the book. I skipped half the lectures and read the book and got an A. Just read and to the practice problems in each section, you'll be fine

What I believe people fail to do is read the material BEFORE lecture. Of course you're going to be lost and confused if you have no prior understanding to the material! Gainer is very helpful and lectures well. His tests are lengthy, but fair. People who don't do well obviously don't put in enough work or effort.

A horrible teacher. The material is tough but Gainer makes it that much more confusing. Don't expect to learn anything from lecture or follow anything he writes on the board. Reading helps but there are no solutions for Mohrig. This course and prof need major improvement.

Means well, but god is he awful at teaching. Just feels like he is walking through reactions for himself, and happens to be saying his work out loud in front of a couple hundred people. There is no framing or building up to concepts, just a constant blur of lines and arrows. Lecture is useless except for clicker points.

Gainer is a wonderful lecturer, and is very passionate about chemistry. He is extremely thorough and will take time to answer questions in class. What I believe people fail to understand is that they are enrolled in an upper division chemistry course. Work outside of class is crucial however Gainer is there to clarify, for that he is awesome.

Gainer is a good lecturer - he actually lectures! He is interested in not only teaching the material, but also making sure students understand it. You need to read the book and go to class for iClicker and notes (no powerpoints). His tests are really difficult, but you get extra points from homework and iClicker, so overall it's not too bad!

He's enthusiastic about teaching but he's unclear sometimes, and once you're lost you don't know what's going on for the rest of lecture. He doesn't use powerpoint slides, everything is on the chalkboard which made note taking hard. Also, tests were a lot harder than what was taught in the textbook and lecture.

Gainer is a really nice guy. He wants his students to do well and is really approachable. His tests were a bit difficult but if you did book problems and read the book you would be fine! Go to class!! You get participation points for using your iClicker.

Dr. Gainer is a new professor and it shows. That being said, he cares about his students and his tests are predictable. Just read Bruice's text and you will be fine. REALLY read the text and do the problems though. That's the only way you will do well.

Has interest in students doing well and is nice but he is new and inexperienced so his quizzes are difficult and cover material taught in the same lecture. The best way to learn is to read the textbook.