had him for the whole 109 series, is a great lecturer and provides very useful practice exams before the exams. doing the practice book problems is necessary to succeed on exams. very kind and understanding when you dont complete hw on time and office hours are helpful to clear up confusion. difficult course but put in the time and you're good

Had lewis for 109 B/C, & he is one of the best professors I've had at UCSB. I don't understand how he manages to make such a complicated subject so well organized & so much easier to understand. He has the sweetest energy and is so kind. He wore Hawaiian shirts every Friday. He does his best to make Ochem as bearable as possible, & has fair exams.

Prof. Lewis genuinely cares about your success in the class. There are many ways to get help outside of class - forums on Gauchospace where he will respond with a detailed explanation, office hours, and CLAS. These three resources + book problems will guarantee your success in the class.

Most organized and clear instructor I've ever had. Lets you know exactly how to succeed and gives you the tools to do so. Believe the hype. Go with Lewis

Absolutely incredible, you won't find another professor like him.

He's solid, but definitely overhyped. I preferred Gainer for sure - Lewis's tests are a little easier but he doesn't drill it in the same way Gainer did.

I hated this class and Lewis did not make it any easier. Quizzes were impossible to study for and they were way harder than the practice worksheets. It was also so annoying that he would only give us 1 minute for iClicker questions as soon as class starts. Sometimes the wifi would make it so I couldn't answer on time, but he does not care.

Lewis is the GOAT. If you go to his lectures, he does a very good job explaining the material. The class is determined by semi-weekly quizzes and a final (plus a few other easy things to make them weigh less). If you miss class he uploads lecture videos from previous quarters (don't depend on binging these the night before a quiz, it doesn't work)

Lewis is a super fair teacher and has the most clear and organized lecture notes. Read the book, do book problems, and worksheets for every chapter and you will 100% succeed. I had Gainer for 109C and he was super disorganized and barley finished teaching the material. If you are choosing between the two take lewis.

When I think of OChem, I think of Dr. Lewis. You have to take this professor if you're taking Ochem here. He is such an amazing professor and his lectures are so concise and easy to understand. Read the textbook, do the book problems, and attend his lectures if you want an A in this course. Ochem is hard, but if you work hard, you're golden. Gluck.

Robert Lewis is seriously one of the best professors here and he really cares about his students. The bad reviews from his class are from those who either got a bad grade or simply didn't put enough time. Organic chemistry is hard in itself, but Lewis' exams/quizzes were always fair. Nothing was unexpected on the exams and do book problems!

literally so hard. way harder than other professors. puts stuff on his quizzes that you've never seen before and expects everyone to know it. Averages are always below a 50%. Unhelpful when you ask questions and blames you when he makes mistakes on his worksheets I had to retake and ended up with a B the second time around.

Read the textbook, most of his lectures come directly from it. He's nice, but doing well requires a lot of consistent work.

Dr. Lewis is by far the best chemistry teacher here. He is so passionate and great at explaining concepts I went from hating and almost failing gen chem to kind of enjoying ochem. He is very caring and responsive to students. The class is a lot of work but if you attend lectures, do textbook readings AND BOOK PROBLEMS you can succeed in this class.

Just absolute Daddy GOAT. He posts lectures and discussion videos online. Goes through the materials thoroughly. Very fair exams and quizzes since he ACTUALLY tests you on the stuff he teaches. Very accessible outside of class as he really tries to establish various ways of contact. Everybody can do well if they really tried. Great Prof, Daddy GOAT

What he tested on quizzes was usually not what he discussed in lectures. You have to read the textbook hard in order to master this course. He was also a tough grader. People were suffering from ochem, but he provided minimal curve. He significantly sapped my motivation to learn more ochem. So, why take his course?

Lewis is a great professor and cares about his students' success. I did struggle in the course though solely due to the structure of the course. We have quizzes every other week, which I feel doesn't give enough time to gain clarification on topics one is not solid on for the quizzes.

Professor lewis was great. He allowed corrections on quizzes if you gave good reasoning to why you deserve points. Quizzes make up most of your grade but if you do well on the final that could help if quiz scores are low. Also curved the class. taking him next quarter for 109B

For OChem, Lewis is an amazing professor. For how difficult the content was, his quizzes were always fair and tried his best to prepare us with the amount of time we had. OChem is a really hard class in general, so a lot more of it comes down to personally studying and doing book problems.

First time in a year that Ochem classes were in person. His class is def doable to get a good grade in and attending Office Hours will help you. While I didnt do as well as I hope bc of poor time management his class is very fair with six quizzes and no midterms only one final and also some homework points. He is approachable and a great help

Lewis is one of the few professors here at UCSB that genuinely cares for students. His teaching is by far one of the best and made o-chem not as bad as it seems. His quizzes are very fair and if you want an A I recommend putting in the work to do book problems since it's very similar to his exams.

Lewis is a pretty good professor. His lectures are good, has a clear grading criteria, and genuinely wants his students to succeed. This class is very difficult though, you will need to do the practice problems in the textbook if you want to succeed, it isn't enough to just attend lectures.

Lewis is a solid option in this dept. He is pretty clear in grading criteria, and always explains what is needed to be successful in the course. But, the course isn't easy. It is tempting to not show up for lecture/cram for exams but that will lose you a lot of important points. Space studying, ask questions. Try not to rely on the curve. Good luck

Maybe my favorite professor at UCSB even though chemistry may be the bane of my existence. I took Lewis for the entire Ochem series online so we had weekly quizzes which made up most of our grade and one "final quiz". I watched the lectures and then read which made the book an easier read. Does give some opportunities for extra credit. Lewis GOAT