He acutally made pchem fun and interesting! Great class.

His lectures are organized, and it's helpful that he provides those slides at the class website. He does his best to explain really really difficult concepts , and a lot of the time succeeds. He's also great at giving extra help outside of class. Be prepared to brush up on those integration skills.

Best Chemistry professor I've had so far. Very organized and teaches material in a very logical order. Breaks down material as best he could (quantum is hard to teach!), which 99% of the time he is successful. Good sense of humor. Lays out expectations very clearly.

Dr. Li consistently showed that he cared about our learning.

Very straightforward class and very helpful teacher. In class test reviews were also very helpful. Midterms and finals are very similar to the practice tests he gives.

His class requires a lot of work if you want to keep up with lectures. But he is a funny guy and you'll enjoy listening to him lecturing p-chem stuff...

He is one of the best Chem Profs that I have ever had. I took Chem 455 and chem 465 from him. TAKE BOTH!!!!

This guy moved a little too fast for me, but he repeated everything over and over, so there's that. Honestly, I thought his TA was more helpful making things easier to understand. Expectations were pretty clear and homework was reasonable, although tests can be tough.

Best professor ive had at UW hands down. Funny and a genius. PChem had a notoriously bad rep when I went into it but Li turned all that around. Super interesting, well organized. The guy literally tells you problems that will be on the tests if you go to lecture. Its hard work and a bit math heavy but so very worth it. TAKE IT WITH HIM IF YOU CAN!

Awesome professor! Take his 455 and 456 if you can. I regret I didn't take 455 with him, because he knows how to teach! I got 4.0 in 456. Very very nice guy!

He's so adorable. You can barely understand him but he sends out all the power-points and reviews/keys to reviews. He's so nice and understanding. Very easy class. But he's a fantastic teacher and always willing to help!

I failed this class, but I wouldn't say that it was Professor Li's fault. He's a really nice guy, likes making jokes, and tries to motivate his students. The topics were difficult for me, but I think the majority of the class thought that it was fine compared to what they heard about other teachers. There were no surprises on tests, just study!

Dr. Li was a very nice guy. Does a good job of trying to motivate his students and has a positive attitude about everything. 142 with him was easy, I'm glad I had him. One of his tests was exactly the same as a worksheet he gave us. Just study the practice tests he gives you and do problems from the book and you'll be fine!

A true legend. The best chemistry professor I have ever had at UW. #lizardsquad

He has a nice sense of humor and tries to make lectures very clear. Cool guy- really into the seahawks, makes fun of himself when he makes mistakes. I would take another class from him.

xiaosong LI is really an amazing teacher!!!!! love him!!!!!!

He's super kind, encouraging and funny. Very engaged during lecture, especially with demos. Encourages students to work hard and do well in the course. Has a heavy Chinese accent but fairly easy to understand. I don't think you would pas this class without going to lecture. His examples are not great, just go to the chem study center.

TESTS ARE EASY!!!! I got 95 on my first exam, 100 on my second exam and 95 on my final exam. And I got 4.0 !!!!! When I come to his office, and he can remember all my scores just after I told him my name!!!! this teacher is amazing!!!! His exam is very easy, all you need to do is listening to the lecture carefully and you can get 4.0 easily!!

While some of the information covered in lecture was pretty boring, Professor Li's sense of humor made the class fairly enjoyable. The tests were very reasonable and involved a lot of calculations.

awesome!!!!!!

Li is awesome. I came into 142 thinking I wouldn't stand a chance, but he made everything extremely to understand in the lectures, even though they can be fast paced. However, he posts all of his slides online, and his practice midterms are exactly like the tests. I wish he was teaching 152, because I would definitely take another class by him.

I was scared for this class, but professor Li made it a lot easier. Just make sure to attend class and go over his lecture slides at home (I usually went over the lecture slides ahead of time so I can listen during lectures). Exams are just like the practice tests he gives out.

He is pretty reachable and actually replies to your email. Very easy to see him during his office hour. His tests are not too easy but are very similar to the practice tests he gives out. Occasionally adds some humor in class, which is nice. From what I heard, I thinks he is the easiest chem 142 teacher this quarter.

Great Professor. I Was very nervous going into Chem 142 but this class was much easier than I thought it was going to be. Lectures were fine and covered all of the information that was going to be on the test. He is very generous with his grades, if you score above one standard deviation on the tests and do ok on the labs expect a 4.0.

Sometimes it's hard to follow along during lecture and that he messes up occasionally when explaining practice problems but overall his lectures were enjoyable. When he messed up he laughed it off and his sense of humor made the lectures bearable. The midterms were doable but I found the final to be more difficult so be prepared for that.

Pretty good professor and really care about his student

I think Professor Li is a solid choice for Chem142 especially if you have some chemistry background (he skips the easy parts). His tests were straight from his lectures and if you pay attention in class, you can definitely ace it. He puts a lot of focus on the tests, and he does demos a lot. His sense of humor is amazing. The TA (J) was cool too!!

Professor Li is so funny and genuine. He makes his lectures fun, although he tends to skip through the "easy" material really fast. His tests are different than his practice tests that he posts online, pay attention to clicker sessions because those questions will be on there! Labs were easy and TA was a lot of help.

Dr. Li's class was enjoyable, but the tests were hard. Make sure to come prepared for the tests if you want to score above median. Pay attention to lecture, as he usually focuses on topics that he is gonna put on the test. I'd say practice tests and problems in the back of the chapter were most helpful for tests. My TA was also really helpful.

I struggled quite a bit at the beginning of the course and did badly on my first midterm, but he was really approachable, was eager to talk over my exams with me, and was just overall really helpful and accessible and actually appeared invested in helping me understand the course material.

Second time taking Chem 142 and wow what a difference a professor makes. Professor Li is very accessible outside of class and really cares if you understand material or not. It may not seem like it in lecture but MAKE THE EFFORT TO GO TO OFFICE HOURS! That's what he is trying to tell his students.

Prof. Li is great! I found his lectures pretty informative, and he's not hard to follow (his accent is really not a big deal). He loves helping out students and his test review is basically the test - examples on his slideshows are really helpful too. I will warn you that the exams are tightly timed scantron exams and you need to be ready for them.

I liked Li as a professor, he had clear grading and lectures. All of his notes are on canvas and if you prefer to learn on your own you could only show up on clicker session days (which he always announces in advance). I didn't use the textbook at all, I just did the Aleks hw and practice exams to study for tests and did fine.

Great lectures that covered all the material efficiently by being vague when need be to provoke thought and thorough on harder concepts. Mentions exactly everything that will be tested on so go to lectures to hear what will be on the exams. Practice midterms are extremely helpful and mirror the exam. Problems in the book look like what is on exams.

Absolutely great professor. Funny demo experiments!

Funny demo experiments, clear materials from powerpoint. If you have taken chemistry before, take a class with him! He is approachable, clear, and dont forget to go to class when there is pollEverywhere(trust me, it's really helpful! most of the questions in the exam are sometimes similar to them)

Li doesn't get enough credit. He genuinely cares that his students do well. He gave 15% of my class 4.0s and his love for demos made every class enjoyable. Yes, you have to study outside of class to do well but it's not so bad. Compared to other Chem teachers, Li gave out the least amount of work and the highest grades. He also bumped up our curve

He's a pretty good professor even though he has a bit of an accent. Would take this class again.

Dr. Li was a super fun teacher with a great sense of humor. He is a researcher but has an excellent ability to communicate the material to his students. He has an accent but if you have a very good grip on English it isn't too bad. Some of his test questions are sneaky hard but we beat his expectations so the class wasn't that hard. I'd take again.

Cared that his students learned the material and gave great demos.

Professor Li is honestly a pretty great professor. So long as you read the textbook along with the lectures, you ought to be pretty well off in the class! Li himself provides fun in lecture demonstrations and is very well versed in what he is teaching. Be careful though, as he does go over concepts pretty fast if that poses a problem for you.

He is a great guy, and it is obvious that he loves to teach chem. The class is very difficult so be prepared to work outside of class. The tests have a lot of trick questions and they are a time crunch. The class is heavy on tests,so to get a good grade you have to do better than everyone else.

The tests are a time crunch but if you practice a fair amount you'll likely be fine. There are times when he goes fast through lecture or doesn't explain an example super well but he still covers content in lecture well. I would definitely still read the textbook though. Fun demos every class!

This course in general covers similar material to high school chem (I didn't take AP), with a couple more math-y lessons. In my opinion, he went over very little of the difficult problems and too much of the easy problems. He does lots of demos and I recommend doing practice problems in order to do well on the test! Btw, his accent really isn't bad

Professor Li was not that bad of a teacher. His tests were multiple choice and fairly straightforward. If you study a bit, you can easily finish them within the given amount of time. Great thing about Li is that if your class exceeds his expectations for a test, he bumps up the curve. For my class, the curve was set from a 2.7 to a 3.0.

All CHEM 142 classes are set to a curve of 2.6, so of course this was a difficult, competitive class, but Li got us through it. He had many engaging demos, he answered questions, and he even raised our entire class' curve. Honestly, CHEM 142 is going to be hard no matter what, but you can make it through this class if you study hard and show up.

He did a good job!

Li was a great guy and seemed to really care about if his students did well. He moved the curve up so the median was a 3.0, so we didn't get punished for being a smart class-I really appreciated this. Some people complain about his demos, but I thought they were always fun and interesting, and you could tell he put effort into planning them.

Li is one of the best chem profs at UW. His lectures are fine and he'll crack a joke here and there. Make sure to show up to the lecture before the exams because there will be helpful review sessions. Also, the curve my quarter was set to a 3.0 which was great.

If you do the readings before class and complete the ALEKS hw, it should be an easy class. His midterms were easy the averages were really high, but the final was nothing like the midterms (do the book problems for the final).

He was a great professor and his lectures were very good. Compared to other chem professors he is by far the best. I would recommend this class. He curved my class to 3.0

Quite easy class. Exams are basic mutiple choices. He's really a chinese-style professer.

He doesn't really seem to care much about his teaching and is obviously here for his research, but his exams are very easy and CHEM 142 is the only 4.0 I've gotten at UW so far haha. If you're choosing between him and Craig I'd choose Craig but otherwise his class was awesome considering how uninterested he appears in teaching it (he's funny too).

He is funny and does interesting demos in class.

Professor Li is the best man on the UW campus. During his weekly tutorials, he goes through example problems for the weekly quizzes that are extremely helpful. He is also the sweetest and funniest professor I've had and really cares about his students. Please take this mans class!

Professor Li is really kind and shows that he wants his students to do well. The majority of your grade is based on weekly quizzes that as long as you pay attention in lectures and tutorials and study enough you'll do fine. There's a lot of homework on ALEKS, but its doable. He teaches really well and is helpful when you ask questions.

I've heard Li is definitely one of the better professors for this class. I think a lot of the ratings are because the class itself is really difficult, especially for intro freshman. His lectures are clear but the tutorial sessions are what relate back to whats on quizzes. So many kids in this class, I used my TA a lot more than Li.

Li's teaching style is fast so if you don't have a basic understanding of chemistry, it can be hard. As long as you finish ALEX, do good on lab reports, and get average scores on 5/7 quizzes, you can get a 3.0 in this class. The 24min. weekly quizzes can be difficult, some weeks are easier than others.

There was a lot of work to do and at least in my case I had to spend a lot of time studying. Class wasn't mandatory but definitely recommend, I would also advise you to do the Aleks homework assignments as soon as you can as well as the reading. Then use the recorded lectures as review. There are also no midterms just weekly quizzes and a final.

Took this class my first semester at UW and hadn't taken chem since sophomore year in HS. Was really worried but I read the textbook and finished Aleks before quizzes so it was not too bad! Lecturing is a bit boring and demos don't really help so you have to do your own work. His quizzes/exams are math-heavy too but easy once you get the hang of it

Good professor with clear outline of course expectations and material. Since it was online, he was only accessible through his tutorial sections, or by a scheduled meeting. His recorded lectures were easy to understand, but if you read the book and take notes well, you should be fine.

Professor Li sometimes glosses over topics during prerecorded lectures. Usually, I found it best to read the chapter from the textbook before watching his lectures. In addition, to do well in the class, it is crucial to attend the live tutorial sessions. In these, Professor Li goes over clicker questions that are similar to the quizzes.

Admittedly, Professor LI has a vey cold persona and would make you feel insignificant at times. However, when it comes to assignments, Professor Li is very fair on the topics that he gives on the tests. His clicker questions are directly related to the multiple choice questions that you get and the aleks is only slightly computational.

Seriously, do NOT procrastinate. I recommend doing the ALEKS work way in advance, because it will help you understand the lectures. Professor Li is nice, but he doesnt explain everything in a clear way. Take advantage of the TA in the quiz and lab sections if you have questions!!

I loved this class and by far was my favorite class of first quarter. Professor Li is so fun and he makes jokes that are funny throughout the course and in his demos. He is very realistic about your chances of passing and I found the workload to be entirely manageable and the content to be fairly simple. I did AP, organic, and enriched chem though.

Professor Li is a fine professor - not spectacular but definitely not terrible either. His average on the exams is always a 70 and he rewards the class if they do better by increasing the median. All are multiple choice, no quizzes, and clear course structure. There is a fair amount of ALEKS hmwk due each week though it is very helpful.

I love professor Li. Obviously the class is hard, but his humor at 8:30 in the morning makes it a lot better. I would take his class in a heartbeat again, easily my best teacher this quarter. ALEKS sucks and labs are graded extremely hard but honestly, if you know basic chemistry youll be more than fine

He was a pretty decent lecturer but attending lectures were not crucial to understanding concepts (at least for me). I did most of my learning from ALEKS, textbook readings, and the practice worksheets. The practice midterms/final were very similar to the actual tests so make sure to do them!

Li was overall a great professor. He kept lectures fairly interesting, although it did get a little bit repetitive with slideshows. Luckily, this also meant that the course content was easily accessible from Canvas if you missed lecture. His study guides were very representative of the tests and he was generally clear about what would be on tests.

very straightforward and good lecturer, tho he fairly often skipped stuff he claims students should know from high school chem. the tests are hard bc u have very little time for each question, but there's almost no surprises on exams. Li is a pretty cool dude and makes jokes at times, would definitely recommend for 142!!

The lectures were eh but the demonstrations were fun to watch. If you can't make lectures there are some online so it's not a big deal. Make sure to review the practice tests and the clicker questions like a thousand times before midterms/finals and you'll do great. Overall wasn't too difficult and the professor gives you room to do well.

Li was a solid choice for Chem 142. I liked that his exams were very similar and even some questions were identical to the practice exams. Be sure to nail down every question of the practice exam and understand the clicker sessions and the exams will be pretty easy to do well on. Do not forget to do well on ALEKS and labs. It will help your grade.

Li is a skilled lecturer, tests are reasonable if you go to class and do the practice tests, and there is a lot of ALEKS homework but that's unavoidable. The class isn't easy but it's not supposed to be. There are lots of resources provided, so make sure you find the ones that work for you and use them.

Xiaosong Li is one UW professor who is truly a matter of taste. I personally enjoyed his style. It helps that he is very upfront about your grade projection after each exam. The exams are hard if you do not study. Choosing to take the exam without doing the practice exam is a suicide mission. Do the ALEKS, be engaged, and you will get a 4.0. Enjoy.

Prof. Li is not super loving or sweet, but he was pretty funny and if you actually put in work, the tests arent terrible, especially with the curves. Hes also pretty clear during lecture, and if you dont understand something the textbook can help.

For me personally, I didn't really pay too much attention during lecture. I just took notes from ALEKS (the homework website) and I knew what was going on during lecture and on tests. Didn't read anything from the book.

prof li was a super entertaining lecturer, but im ngl the class is test heavy and if you dont show up to lecture/read the textbook the class will be hard. however, if you show up to lecture you'll be completely fine

If you have the chance to take a class with professor Li, DO IT! He is a great lecturer you have to come to class, do the ALEKS ( do not procrastinate), and do practice exams to do well in the class but its very feasible. I personally had a great TA as well which I know is a hit or miss but I would definitely recommend taking advantage of the chem

Prof Li is a funny guy and very straightforward on what are on his tests. I did well in this class because I practiced the exact points he mentioned would be on the tests. Demos are cool and he's a nice professors. Can't access him much because there are so many students so rely on your TAs for help.

great professor to take if you are planning to take chem 142. Test are somewhat easy if you can do practice exam and PoV question. I never read the textbook but if you want a 4.0 i would recommend you to read it. Overall one of the best prof. from chem department

Professor Li is a solid chemistry professor. His lectures draw directly from the textbook and his multiple-choice exams do a fair job at reflecting what is taught in class. The online homework program, ALEKS, may be a bit much at times but manageable with time management. Lastly, Professor Li does skim over content he deems "AP Chemistry" content.

A decent professor. He occasionally glosses over topics but those topics are also usually not covered on the exams. The class does have a lot of homework, and ALEKS will leave you traumatized by the end of the quarter - its an extremely punishing HW system time-wise (not grade-wise) but does provide an infinite source of practice

Take this class with Professor Li! He's a real gem and the lecture demos are super fun! Do the work, put in the effort, and you'll be fine! His lectures and practice material are really helpful for the midterms and final. There is a lot of ALEKS but it's honestly helpful for practice. Use the textbook for help!

Mr Li is a pretty good choice. He's funny and seems to care that you pass. I barely read the textbook and took minimal notes, but I still managed to get a B. Just study and practice the practice exams he posts a lot and do the worksheets and you should be fine. Also do the aleks work and lab stuff. That's easy points.

Li was a good chemistry lecturer! He was engaging and going to lecture actually helped my understanding, but unfortunately his pace for lecture was slightly behind the homework at so some of the things he had to say you already had learned on your own. I would absolutely take Li again. His grading was fair and expectations were clear.

I found his class structure and grade distribution to be fair. His exams are all multiple choice and he gives you a detailed info sheet for the exam and allows you to bring your own. There is a lot of ALEKS each week but it was a good supplement to his lectures and buffer for my grade.