tl;dr - good teacher, awful midterms, good grading curve, good discussion worksheets, good final.

I think that Shao was a really good professor, who had little idea of how to time a midterm. I learned a lot in this course, and this was mostly due to Shao's really clear lecture notes, which were posted to canvas (ccle? idk whichever) as both blank before class and then annotated after class, which was really helpful for adding things that I'd missed and just general review. During the lectures themselves, Shao would sometimes go off in small tangents or explain a concept but not really to the full extent, which left me not really knowing how to apply an equation or the point of an experiment/ phenomena that we had to know. Shao had 4 hrs of office hours per week, but I could only make one hour of them due to conflicting class times. It didn't really matter a huge amount though, because I was able to set up meeting times outside of those OHs and she'd stand outside of the lec hall for 10 minutes answering small questions after each lecture. All great stuff.

As for the midterms - yikes. I got about a 70 on the first one (average) mostly because of rushing through all (I think) 7 multiple part questions in the 50 minute block and making a lot of calculator input errors and not having time to check anything. I got about a 50 (again an average of 70ish) because of panicking on time and missing an important question. Thankfully though, Shao posted both an answer key and a video of her going through each question on the midterm and explaining why she was solving it the way that she did. This helped for regrade attempts. The midterms and final were 15%, 15% and then 20%, with cengage assignments and worksheets being 50% (and they were rarely difficult - just time consuming). This saved my ass and I ended up with an 89 in the class (along with extra credit) and that curved to an A-.

I'd take her class again.

This class is quite fast-paced! The content covered before the first midterm has to do mostly with quantum mechanics and is very different from high school AP Chemistry curricula. Though the tests are a bit challenging (with a class average of 65-70 for both midterms), the main constraint is time. I can't stress this enough — practice the sample problems covered during weekly lectures and make sure you understand the physical meanings of equations and concepts covered in class. During midterms, solve questions as quickly as possible and go back later to check your answers — you'll find the tests pretty straightforward if you work quickly.

All exams are open book/open note, and Professor Shao shows that she really wants you to understand and apply what you've learned rather than memorizing lecture material. Make sure to review consistently, since there's quite a bit of material covered during each class.

The lectures are easier after the first midterm (circling back to stoichiometry, VSEPR, etc.) and there are plenty of ways to boost your grade throughout the quarter; if you do the weekly discussion worksheets and Cengage assignments on time, they are almost a guaranteed 100% if you're thorough. Start early! The Cengage problems take 3-5 hours for 30 questions online per week. (Pro tip: If you don't know how to solve something, just hit "submit" and the program will walk you step-by-step through the problem. You get 10 tries per question.)

The grade distribution is as follows:

Chapter-end Cengage HW (20%)
Collaborative worksheets in discussion (30%)
Midterm 1 (15%)
Midterm 2 (15%)
Final (20%)
Total: 1000 pts.
Extra Credit (surveys, activities) 30 pts.

Also — I recommend printing blank lecture notes out before class, filling them in and checking them later with the annotated version she uploads to Canvas. Professor Shao speaks very quickly during her lectures, but she uploads lots of helpful resources online and takes student feedback seriously to make her content easier to understand.

I did not use the textbook and got by fine. Overall, Professor Shao is a great person and teacher despite it being her first time teaching Chem 20A here. I'm really glad to have had her during my first quarter along with my TA, Ran, who was super helpful and quick to answer any questions I had.

Although the first part of the class and its material may seem hard, Shao understands and really goes through a lot to help students understand. Also, it is important to do the worksheets in discussions as they greatly help the exams. The exams weren't a breeze (the final was def way easier) but definitely doable if one puts in the effort. Also it is open note/open book so that helps as well.

Shao is a very clear professor, and by going to lectures, doing the homework, and doing the review material that's posted on her very organized canvas page I did very well on the final. Some of the concepts are more difficult, and she goes over them at the same pace as some of the easier material. Such is the quarter system. I think that she's a pretty good professor, and would recommend her to others taking the class.

10/10 I met my girlfriend in this class and got an A

Honestly, I am surprised at the overwhelming positivity of the other reviews. To be fair, Professor Shao was very nice – and generous in terms of her grading scheme, giving extra credit opportunities, etc. – but I struggled in her class, and most other people I talked during the quarter really didn't like it either. I had a reasonable background in chem and some knowledge of the quantum mechanics topics we covered, but I only understood what was happening in like 4 of the 25-30 lectures she gave throughout the quarter. I found her manner of lecturing really disjointed and confusing, and I had a lot of trouble connecting topics to each other/example problems as a result. I ended up reading through like 5 chapters of the textbook before each midterm in a desperate hope to understand what was going on (and tbh it helped a bit but was absolutely miserable).

That being said, I do think she cares about her students and wants to give them as many opportunities as possible to succeed. In the big scheme of things her class is probably pretty decent, but personally if I had to take 20A again I would not want to do it with Shao.

Grade breakdown: 35% homework, 20% midterm 1, 20% midterm 2, 25% final, and 3% extra credit.
Overall, the class was okay. Not a super fun class that I’d take again but not too bad either.
Lectures are recorded and not mandatory, I found them interesting so I went to all of them anyways. The lectures are very structured with the template pdf files uploaded ahead of time for note taking. Dr. Shao also goes over example problems in class.
Discussion and tutorial session is just the TA going over hw problems which is boring, attendance not mandatory, I still went just to copy down the homework answers.
Both the Professor and TA hold a two-hour long office hours once a week.
The workload is extremely light, with 8 problems a week. Half graded on completion and half on accuracy. The completion based problems are difficult but will be discussed by the TA so these are basically free points, and the accuracy based problems are pretty easy.
Since the required workload is so light, definitely do practice textbook problems own your own, Dr. Shao emphasized that the exam problem would be very similarly structured. I didn’t do any of these and struggled with the exams way too much, so I regret my choices in hindsight.
A curve is applied to raise class average to 80% if the average falls below that.

I totally agree with all the comments which are saying this class is a disaster, but I just don't understand how these guys could all get an A. I'm taking this class right now, and after the first midterm, my score has already below A (to receive an A, you have to as least get 94%). I didn't do well in the first midterm but almost my best. My score is almost the same as average 73%. I spent over 5 hours on the assignment on Cengage at the end of every chapter, which can't be more depressing. This class will definitely ruin my GPA.

The lectures were fast but interesting. Although the midterms were difficult and hard to finish on time, the final was fairly simple and 50% of the grade was based on worksheets/homework. In addition, the grading scale was shifted so that 85-90 was an A- etc.. Midterms and Final were open note.

Professor Shao is really helpful. Definitely will take her class again.