Lewis is a true gem. His tests can be pretty hard, but he's super straight forward in what he wants you to learn and what you can expect to be on the test. He also gives you the opportunity to get your test regraded if you missed points unfairly, and he gives extra credit. He's also funny and really made THICCPEPTIDE an answer to a quiz question

I LOVE HIM. Go to lecture, skim the textbook, do hw problems, attend CLAS aka put in the work and youll succeed. Hes so organized and lays out everything you need to do to succeed. There is some extra credit. Though he doesnt do a massive curve like Aue, the homework and clicker questions will bring your test scores up indefinitely. Very funny 2

Lewis is one of the best profs I've had, cares a lot about his students and always available to help by e-mail or office hours. Very approachable and kind. His tests can be tough but they're always fair. He doesn't try to trick you he just wants you to understand the material. Would 100% recommend him.

109B is challenging! Personally, I wouldn't take Lewis again. He is nice, extremely organized. He goes through each mechanisms so fast and expect you to have to do the application yourself. He doesn't explain, make relations between the mechanisms that help you understand. He is not engaging; his voice is monotone. Not the best lecturer. Nice guy

Professor Lewis is one of the best lecturers I've had at UCSB thus far. He is really engaging and generally cares that students excel in such a difficult subject. Go to his office hours he is very straightforward and easy to talk to. Really changed my perspective of OCHEM and he uses a lot of memes while lecturing and real world applications.

He's the sweetest professor ever. He genuinely cares about his students. He's so fair and reasonable. Ochem is hard no matter who you take but at least a good professor makes it less depressing. You'll pass with a good grade with professor like as long as you put in the work. He's so precious wish I could take him for 109c also.

Best professor! I went from failing 109A with Bruice to A's with Lewis for 109A & 109B. He cares so much for his students, makes time for them, and is very easy to approach. His exams are tough, but he gives as much partial credit as he can. Attending CLAS, office hours, and actually reading the textbook and doing the problems will get you far.

Clearly cares about his students. Continuously assigns chapters to do at home that he can't get to in class. Teaching is straight out of the textbook and attendance is required so prepare to waste a lot of time in class. Book problems are somewhat helpful but there are discrepancies between the book and his tests

Cool guy, tests are always hard but that's OCHEM. Really fun to talk to during office hours

Dr. Lewis was a great organic chemistry lecturer -- he walked through reaction mechanisms on the chalkboard in addition to displaying useful notes in his PowerPoint slides, and asked occasional iClicker questions to drum up student participation and gauge where the class was at. His exams were fair, but are subject to change as Dr. Lewis is new.

I'm not a big organic chemistry fan, but Rob really makes it a blissful experience. It's very hard material, but if you go to lectures (and enjoy his occasional memes and funfacts), read the textbook, and do book problems, you'll at least get a B. Which is pretty much amazing for a student like me. 5/7 recommend. He's amazing.

a decent professor

Awesome teacher. very organized lectures, and fair tests. Curve is necessary.

Best OChem professor on campus. Clearly cares about the students and actually teaching them useful information. Gives extra credit. Curve is pretty high. Tests are hard, but he prepares you for them. Very easy to talk to and office hours are helpful.

Robert Lewis is hands down the best Organic chemistry teacher on campus. I took his summer course and he made OChem a very interesting subject. His grading is very fair, and his tests are taken from book problems and online homework. If you get the chance to take this class with him DO IT. All other OChem profs are subpar.

Ochem is hard in general, but Lewis does his best. HIs exams for 109C were not bad, but they were filled with questions that tested specific textbook knowledge, so READ THE TEXTBOOK. He's super responsive/helpful in Canvas discussions, so take advantage of that too. 109C wasn't as bad as 109B, but you still need to work a lot to get a decent grade.

ochem is hard, but lewis is goated

Although this class was very hard, Lewis is the best teacher I've had at UCSB. It feels like he actually cares about the success of his students, and people only rank him badly because they don't know the difference between a hard professor and a hard class. Don't expect a curve unless you're taking the class a quarter late!

OCHEM is definitely tough and requires self-discipline and commitment—you'll feel overwhelmed at times. But Dr. Lewis is one of the best professors out there. He teaches with such clarity and calmness that the material feels more approachable. He's also kind, patient, and genuinely encourages questions.

Genuinely everyone I talked to either failed the class, or had no idea what was going on. The curve was insane (I went from a C- to a B+). IDK how this guy can look around, see that MOST of his students are failing, then just change their grades and move on like they will succeed in future classes... Class averages for tests were around 40%. wtf?

he was so hard and honestly did not prepare you well the only reason people did okay was because of the curve.

Lewis is a good lecturer but this course was made for giving up your major. I will hate ochem for my whole life

Though the content is hard, Lewis does an excellent job of explaining it. You can tell he wants all of his students to be successful! He is extremely easy to reach outside of class, an excellent lecturer, and an overall nice guy. My advice for studying: form lecture groups, do book problems, and attend lectures.

Live laugh love Lewis. His lectures are so clear and follow the textbook almost exactly. He makes himself so accessible, use the discussion forum!! Obviously a hard class but he provides so many resources so success is possible.