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.

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!

Goat, highly recommend for ochem. He was very accommodating during the pandemic and even tho ochem was easier online than in-person, if you do book problems and keep up with the readings you'll do good in the class. His lectures are helpful and held discussions sessions where he'd go over material that was in the weekly quizzes. Really nice guy!