I took AP Chemistry during my senior year of high school and didn't struggle too much with this class (despite not studying for it all that much), so if you took AP Chem recently enough to remember the basic concepts, this class probably won't be too much of a struggle.
He has a lot of resources for the class (undergraduate assistants w/ office hours, TA's w/ office hours, Chemistry Community forums, etc), so if you feel that you need the extra help, you can go to these office hours or post on Chemistry Community. He undeniably has many resources he wants to provide for the students, so I appreciated that (though I didn't use them).
He doesn't require homework to be turned in, but doing them helps. He's an OK lecturer and tries to be funny once in a while. The class was alright and manageable.

Lavelle is an OK lecturer, some days are better than others for sure. He pretty much lectures straight out of the course reader, so lecture can be pretty boring. However, he has lots of resources for his students and I would recommend taking advantage of them. Homework isn't mandatory, but you should definitely do all the problems that are assigned because he'll put them on quizzes/midterms/finals. The class consists of 3 quizzes, which aren't too bad, a midterm, and a final. The midterm and the final are more challenging. The material can be confusing sometimes, but this class is definitely manageable.

Before taking this class, I had taken one year of honors chemistry in high school and expected this class to be a struggle. However, I think this class is do-able and not as bad as it seems BECAUSE of the TAs and UAs, not because Lavelle is the best lecturer. (But he is a really nice guy) Lavelle's lectures themselves were of no help to me whatsoever, but he arranges so many TA/UA office hours every day of the week, including weekends, that it was easy for me to get the help I needed. I passed the class from watching youtube videos and going to office hours at least two hours a week. In addition, I spent about 5-6 hours a week doing the homework. His tests are fair and as long as you do the homework, you should be fine.

Lavelle is a good teacher, he gives homework assignments that are optional to turn in. Definitely do them or you will fall behind, I had to watch lots of videos coming in but he does brush on old information, he provides a lot of resources, USE THEM!

The textbook is the key to success in this class. I made a genuine effort to pay attention in this class during lecture at first, but Lavelle is possibly the least engaging lecturer I have ever had, and by the end, I just went to find out what I needed to learn on my own. He also has an ego the size of the moon, which is mostly ignorable, except when he types out his bragging and puts it between questions on the midterm. That being said, if you make sure to read and take notes on the textbook, and do all of the assigned homework problems, you can easily get an A.

Well, he is not bad. But as far as I'm concerned, whenever a professor teaches something for a long time, he is not so good as the new professors. His resources are helpful, especially chemistry community. He doesn't give out assignments that required to be hand in, but you do need to do them for the tests (he's using some of the problems on textbook for midterms and finals. I only bought electronic textbook and that's enough cuz you don't really need to read the readings since his course readers have all of his slides that provide enough information to understand the course. You only need the textbook for practice problems that do not need to be handed in. I am selling my electronic textbook (Chemical Principles, Peter Atkins) for $10 ($169 for paperback on UCLA Store), you will use the same textbook for 14B, text me at: **********. I also have a used course reader (which is really really helpful), which I can sell at $20 with my used quiz (new course readers are over $60).

Professor Lavelle goes over all the basic concepts in lecture but does not always develop them. However he does provides many resources for students to develop those basic concepts on their own (such as the course reader which has all the slides he goes over in lecture, all the past papers since 2006, textbook questions he assigns as optional HW, his online website where you can ask questions any time, and many office hours). To ace this class going to lecture and reviewing the slides is not enough. It is crucial to practice lots of questions on your own time, and luckily Lavelle gives you access to a lot of resources and makes it easier for you to do so.

I took Lavelle for Chem 14A but switched to Li week 2. Lavelle was ok but his lectures are kind of boring. You'll be fine in his class if you're willing to put a lot of work in, but you can't coast by and expect an A.

Selling my Fall 2016 course reader and workbook. Both have barely been used, workbook has a few of the first practice problems done in pencil (not the graded homework/quizzes) but everything else is in new condition. **********

There is no homework, so the amount of work is completely up to you. His tests sometimes have conceptual questions that dont come from his lectures, and you definitely need to read thebook in addition to his lectures. I personally did not do any of the textbook problems, but his tests and quizzes are mostly problem solving so they may be useful.

Dr. Scerri will teach Chemistry 14A next quarter. I heard he is much better than Dr. Lavelle? Ouch, I should have waited until the winter quarter to take 14A.