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.

Dr. Lewis is a great lecturer, especially given the difficulty of the material he teaches. His tests, grading, and curves are very fair. As long as you go to lecture, study, and do assignments, you will do well. I would recommend reading the book chapter of any confusing material to gain clarity. I would also highly recommend the book problems.

Lewis does a good job of relaying the info and providing supplemental videos to go over. I recommend reading the book and doing all the practice problems. Make sure to draw out every mechanism and take no shortcuts. His tests can be hard so make sure you really understand the concepts on the practice midterm. You get what you put in.

Best professor I've ever had at UCSB. Puts in so much effort if you ask for help (use the discussion forums). Is slow and thorough in his lecture notes which became perfect for studying for tests. Class does so well no curve was needed for on sequence. I wish I could have him for every class :)

RESPONDS TO EVERYTHING Professor Lewis has good lectures and will engage with questions in class to clarify. The class is hard but before exams, looking at the discussion posts is helpful. These posts are remarkable how he responds to all of the 80 questions online, in his own time and they're very helpful

Lewis is wonderful and has very clear expectations for what you should know; I never felt like the tests were a surprise. If you can, take it a quarter late (109a in winter instead of fall) as the later quarter gets a greattttt curve that saved me. Put in the time (more than you think you need to) and you'll be rewarded!

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.