The grading scheme for this class was on a straight scale based on the number of points from several categories:
Each midterm is 100 points
Final is 200 points
Top 8 of 10 quizzes are scaled to 100 points
Group projects during discussion section were 50 points.
For a total of 550 points.

The grade scale was relatively generous with 90% being the cutoff for an A, 84% for an A-, 81% for a B+, 77.5% for a B, and 74% for a B-.

This class is difficult, as indicated by the grade scaling, but not impossible to do well in.
The first midterm tested on IR Spec, H-NMR, C-NMR, and Mass Spec. This material was the most difficult for me as there were many tiny details that you had to pay attention to when doing the problems. It is very easy to miss something and lose points because of that.
The second midterm tested mainly on Synthesis problems, with one spectroscopy problem similar to the first midterm. This class is all reactions after the first midterm. For me, Anki flashcards were key to memorizing all of them and doing all the practice problems from the book was great prep for the second midterm and the final.
The final was also mostly synthesis questions, but had two spectroscopy problems.
The timing for the tests was actually decent. I usually 'finished' about 30 minutes before I had to upload to gradescope, so I spent the next 25 minutes combing through my answers and checking for mistakes.
Practice tests were posted before each midterm and final. They were all accurate in difficulty and helpful in gauging how prepared you are for the actual one.
During the (open book/note) tests, I wrote down as much material as possible and had everything in front of me, although I don't think that will be possible in the future once classes are back in person.

The lectures for the class were all pre-recorded and posted on CCLE. The actual lecture time served as office hours. The lectures were kind of dry, but decent enough. Dr. Ow gives you the material and constantly reminds you that the key to doing well is doing practice problems. Keeping up with the material is all on you, so don't slack on watching the lectures. Leave time in the week to do the book problems as well. I highly recommend getting the solutions manual to check your answers. I couldn't find it online, but its relatively cheap if you rent from Chegg or some other service (less than $15).

During discussion sections, we were given 'reaction roadmaps' that showed how to go from molecule to molecule. The group projects were filling in the reagents, reactants, and products in these roadmaps with classmates in your discussion section. These group projects are basically free points if you go to your TA's office hours and make sure everything is correct. The roadmaps are also very useful during tests.

Weekly non-timed quizzes were posted on CCLE, which covered the lecture material for that week. They were relatively easy, but worth checking your answers so you don't miss out on points. You only had one session to do the quiz as well, no stopping in the middle and starting it again at a later time.

The average for both midterms was 64%. I got a 69% on midterm 1 and 85% on midterm 2. I don't know the average for the final, but I it was probably similar to the midterms. I got a 94% on the final and got an A in the class. I assume there was a small upward curve applied to the class as I don't think that I made the cutoff for an A based purely on points.

This professor kinda sucks at lecturing ngl. If you want to actually gain a good understanding of organic chemistry, look elsewhere. He gets visibly annoyed every time you ask a question (even if it's a simple yes/no), and on the off chance that he does try provide clarification or deeper insight into the content, it's never satisfying or clear. He doesn't have passion for the material he teaches and often acts like he doesn't want to be there. Sometimes he is a little funny and entertaining but I never felt like this was someone who cared about chemistry or student learning to a significant degree.

One thing I will give him credit on is that he gives us printed lecture notes that are pretty decent (they are the same as the ones he uses for the 14 series though, which is slightly concerning). The homework is also very manageable and he does give us some practice materials. However, these practice materials tend to be easier than what's actually on the test. Even so, the exams are still pretty fair. Overall, I liked CHEM 30B as a class, but this professor wasn't really anything special.

Grade Breakdown:
Midterms: 35%
Quizzes(Top 4 out of 6): 20%
Discussion: 15%
Canvas Discussion: 5%
Final: 25%

A pretty fair grader, a decent lecturer, and tests are straight forward. Just go to class, try to memorize the reactions/figure out common patterns for mechanisms and do a lot of practice problems and the class shouldn't be too hard. The spectroscopy portion of the class is pretty terrible, but reaction-wise, it shouldn't be too difficult.