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I dont know that I have seen anyone more excited about chemistry.. he even wore his "heavy metals" shirt. Really friendly, and enthusiastic. Who needs a text book then?

Dr. Leznoff had great energy and is a really good prof. there were 4 quizzes and he marked each one very carefully and wrote lots of notes on each person's quiz. Very helpful guy. Take this course with him he really cares about his students and is a lot of fun.

Amazing Prof! Great notes and gives 4 quizzes, which totally make you study and thus remember everything for when the final comes. Best prof to have for Inorganic Chemisrty!

his exam are very close to his problem sets.unlike some prof go complete between exam and lecture. if u study u will do good.

One of the best prof's out there in Chemistry. Really good notes, good lecture, wants you to learn! He will sit down with you until you understand the material. Make sure you get this guy!!!!

Great class! I actually looked forward to lectures- his demos and enthusiasm were fun. The material is pretty hard but he makes it interesting and provides SO much extra help before the midterms and final, if you put in the time you'll do great!

I absolutely loved this class! Professor was very clear in his examples. All exams and assignments were completely fair. Very enthusiastic. I actually looked forward to attending his lectures.

He is a fantastic prof. I absolutely loved going to his lectures, he was fun and interesting. Always helpful and scheduled extra office hours to go over midterms. Absolutely amazing.

Chem 121 was a really difficult course, but Leznoff really was great. He's extremely nerdy and enthusiastic about chemistry, it's awesome. Couldn't think of a better prof for the class. Just study hard and try to keep up with all the concepts.

Best Chemistry prof out there: applies lecture concepts to real- world examples which help me understand the ideas more in depth. Hilarious, extremely smart, and should consider aiming for a Nobel prize award!

The most passionate prof i have ever had, super devoted to his work and always has a big smile on his face. The only problem is that he goes fast, so if you fall behind your screwed. But if you pay attention in class, and i mean PAY ATTENTION, you will do great in his course. Don't slack off and you will be golden. He goes over every single thing.

He's really passionate about chemistry; you can tell. Explains stuff well. The midterm was hard for me, but if you understand everything and maybe make use of the textbook, you should be fine (I didn't do that for the midterm but I did that for the final ((which i found easier)), so there's some advice lol). Also don't fall behind.

Always be sure to read the textbook after lecture. The textbook always clarifies things. Be sure to finish the LON CAPA every week, then get help on how to do the ones that you couldn't complete (assuming you didn't complete all of them). Quantum Mechanics and Thermochem require lots of pre-reading and post lecture reads. He talks fast.

Hello, I was scared of chemistry coming into his class having only having got a 69% in high school ;). This lead me to be very hesitant and scared to take CHEM 121, but I built up my courage and decided to take it. AND WOW, what a professor! He has me on the edge of seat all the time, not only is he a beauty to look at but he also has some brains.

I liked Leznoff a bunch, I thought he was a great guy who was excited about chemistry in general. The course material is heavy and requires many hours to completely grasp. The practice midterm was nothing like the real one, beware of that. Final was easier than the midterm. Do all the homework and read everything a few times over to be successful

Leznoff is amazing!! His lectures are hilarious, and his enthusiasm is contagious! His tests are fair, and notes are well organized and clear. He has plenty of in class demonstrations, which are really cool to see and engaging. I would very highly recommend to take a course with him!

Dr. Leznoff loves chemistry and that shows through his teaching. His lectures are very engaging as he is quite humourous. Chemistry can easily be seen as boring, but he makes it really enjoyable.

Prof Leznoff is really passionate about chemistry and it makes his teaching extremely effective. The Course in general is hard and you have to put in a lot of work, but he is an amazing professor, totally recommend!

Prof Leznoff taught the first half of my chem120 course. Pre-recorded lectures were long but engaging, as he clearly loves what he does. Quizzes were quite difficult considering they're based on LonCapa. NO quiz feedback was given, even with a failing grade on it. Midterm was fair, with some questions copied from homework and the practice exam.

Long lectures, but very engaging and informative. Quizzes were harsh and no solutions posted. Clearly passionate about what he does. Highly recommend taking a course with him if you have the chance!

Prof. Leznoff was awesome. His lectures can be a bit boring, but when he speaks about Chem you can really see how much he loves it. His passion and enthusiasm towards Chemistry really made the course exceptional, and a joy despite its difficulty. Though you're not required to, I recommend reading the textbook because it expands on a lot of topics!

Really nice guy and genuinely loves chemistry. Quizzes are worth more than the final so make sure to take them seriously. Do the assignment questions and textbook questions to study, midterm and final are fair some tricky questions but as long as you understand the material and practice you should do well. Make sure you try to understand concepts.

His lectures were prerecorded in my case, and I could tell he is very passionate, does well in explaining the material and makes it interesting. There is weekly quizzes and homework on top of three lectures a week so if you fall behind, you can't submit a late assignment and it's difficult to catch up.

Prof Leznoff is awesome, his lectures may be long but he does a great job explaining everything. It's clear watching his lectures that he has a passion for teaching and the 'extra' videos he posts are so fun to watch. Keep a note of the questions he points out during lectures, that he hints at because they do show up.

Prof Leznoff is great. He has so much passion and enthusiasm towards the course material. His lectures are very long and heavy on material. I would say his half of the course was a little harder than the second half. The midterm was hard so make sure to do a lot of practice problems.

Love Prof. Leznoff, you can tell how passionate he is and he really is that fun, quirky teacher (he even wears different shirts each lecture that are somehow related to the topic that day) and it's easy to see how much he loves chem. course itself is really material heavy and one complaint is the quizzes, which don't give any feedback at all.

Extremely passionate about chemistry and his enthusiasm is more contagious than the cold. Listening to his lectures was not as painful as someone would expect from a chem lecture. Just stay caught up, because there is so much to learn. A minor inconvenience is that you can't see your quiz results, only the mark itself.

Prof. Leznoff is very passionate about chemistry. Sometimes his lectures went over the allotted 3 x 50 minutes per week. His supplemental lab videos were very interesting to watch. I also looked forward to finding out his shirt of the day.

Very good prof, he makes learning chemistry not a nightmare

such an amazing professor. he's incredibly nice and funny. in his lectures, he has 'show and tell sessions where he'll show cool minerals/ antique items he has. his lectures are long (around 2 hours) but they're super interesting and really well explained. to do well in his class, do the problems in the textbook.

Here's a professor that loves his job. He makes lectures somehow feel shorter than they are and inspires students to learn more about chemistry. Truly a joy to learn from.

One of my favourite profs, he's so passionate about chemistry and makes class fun. Also explains concepts clearly and repeats things that are important/are likely to show up on exams. I'd definitely take another course with him.

the most enthusiastic professor i've ever met. very nice and funny.

Dr. Leznoff is one of the best profs I've had so far. Lectures were interesting and you could tell he has a strong passion for chemistry, especially with his outfits matching the lecture content. Lon capa quizzes and assignments were hard, but the demos were pretty cool and the lectures were too good to skip.

One of the most caring and inspiring professors ever. Made me fall in love with chemistry and rethink my major/future/ Highly recommend attending lectures in person, he is engaging, funny, and exudes enthusiasm. Go to tutorials. Lectures are theory-based, you need tutorials for problem-solving strategies.

Made CHEM120/121 seem a lot less scary than other people made it out to be. He's a great prof and explains everything very thoroughly. I highly recommend doing as many practice problems in the textbook as you can because lectures alone will not help you do well in this class. His exam questions are very similar to textbook questions.

I loved Dr. Leznoff, his lectures were super engaging, and he always made himself available outside class during his office hours where he was excited to help students. I loved his enthusiasm about all the topics he covered, and the way he clearly explained everything. If you want to do well, get the textbook and practice the questions in the book!

Even though the course was extremely difficult, he still did an incredible job at teaching. He did do a lot of examples that he told us are important for exams. His teaching material did help me understand everything a lot more which made it easier to do those questions. I think it was just too much material ngl but it was very interesting.

Prof Leznoff is the best. He embodies a mad scientist in the best way. His lectures were a little bit slow, but there was always a couple jokes thrown in. He really likes the history what we were learning and I found that helps with my understanding of course concepts. His exam was really fair, just make sure to practice. Go to his office hours

Pre-lecture readings of concepts and and the textbook is a requirement to succeed. The subject is heavy and difficult and cannot all be covered in lecture time. His recorded lectures, although longer, are extremely helpful as they are more detailed. Homework is more difficult than midterm but there's unlimited resources for homework help.

He gets a lot of flak for the difficulty of the course, which is really outside of his control. It's a lot of material to cover in one course!! You can really tell he loves his job and he loves his students and he makes lectures engaging and as fun as possible. Just be prepared to put a LOT of work into this class, no matter who's teaching it.

Dr. Leznoff sparked my love for chemistry. You WILL want to have him as your professor, his lectures are extremely engaging, he is a sweetheart, and you can tell that he really enjoys what he is teaching. He posts lots of help videos as well as experiment videos from past terms. Take his class and you won't regret it. 10/10

Very passionate professor, you can go to office hours and ask him about anything that interests you about chemistry. He will give a thoughtful response 100% of the time. CHEM 121 is very difficult and feels like he just needs a few more lectures to fully explain the concepts in the detail he wants to. Do textbook questions and take advice he gives!

Overall, he was a good prof as he was organized and available for help outside class. Make sure to be following along at all times as he does go over things really quickly and it's easy to fall behind. Unfortunately he doesn't do many examples so if you have the textbook try to do the recommended ones. Tutorials helped so much, don't skip those!

Leznoff is super passionate and always had a good time teaching. The content was dull and pretty boring but I don't blame him for that. He didn't go over many examples in class and his slides were awful and filled with a lot of extra useless information. Luckily his explanations were good and that made surviving the dull parts worth it.

Great prof. Not a big chemistry fan but he gives interesting lectures and has an obvious passion for the material and desire to engage. Fair amount of homework (usually there's a discord help server, saved me), but just a really nice and respectable guy.

I am horrible at chemistry (course isnt too bad if your chem skills are strong!) but I was always keen on going to Leznoff's lectures because he makes you wanna be there!! Made me more interested in chemistry than before. Leznoff fun guy, passionate bout them elements. Discord server chat saved my life, do lon capa the moment you get it.

Professor Leznoff is definitely passionate about what he teaches but personally for me, from time to time, I wasn't able to keep up with the material and sometimes I thought he went a little bit fast. He also posted videos on some problem he mentioned in class (but not all). His exams being based on both calculations and some theory questions.

He was always entertaining

Leznoff is definitely passionate about what he teaches, but doesn't go over any examples in class, which makes going to tutorials important in order to do well on the midterm.

Prof Leznoff has an obvious deep love for chemistry and spreads that to the students he teaches. While his lectures were difficult to keep up with as they were very content-heavy, they ended up being extremely helpful to fully understanding topics. He also was a very big proponent of the arts and encouraged students to be well rounded people.

He very clearly loves chemistry and cares a lot about students. (He was especially kind to us when protestors entered our lecture hall and shouted at us.) Lectures were difficult to keep up with as they were very content-heavy, but they were ultimately extremely helpful in fully understanding concepts for the midterm. Just study and you'll be fine

Daniel Leznoff is an amazing prof. His lectures were easy to understand and the content was presented clearly. At the end of his half of the term (the course was co-taught with Jeffrey Warren) he gave this incredible speech about how in uni, you're in the right place to learn literally anything, so do whatever your heart desires. Absolutely 10/10

Great prof very passionate about what he is teaching. Easy to stay engaged during his lectures.

Leznoff is awesome, goes above and beyond to give you tools to succeed. Do the practice questions, utilize the resources he posts before exams. Class has some inherently difficult content but he sets you up for success.

If you're not into chemistry you won't be interested in the lectures but if you are then they will be very engaging and comprehensive for you. Rarely goes over examples in class but the homework is harder than the exams so if you read the chapters and finish the homework you'll be fine. Very caring prof, he always answers questions in lecture.

Very thoughtful and passionate prof, and a great person. He doesn't do many examples during lectures so read the textbook if you are confused. Do the textbook questions because the midterm is based off of it.

Leznoff is a really awesome person and teacher! However, his exams are nothing like the content in the lectures. It will be the same overarching idea but it will be a different structure, different wording, and different numbers. Cool guy though

He is a good teacher, but doesn't do examples in the lectures which make them harder to understand.

Dr. Leznoff made lectures really enjoyable and gave off a good vibe every start of the class via the music videos he would play. They were always specific for the lecture topic and I appreciate his effort to give off these good vibes before delving into the days topics. It was clear that he really had an appreciation for the lessons he was teaching

Prof. Leznoff's passion for chemistry and students doing well is apparent. I really enjoyed his lectures and appreciated his encouragement throughout the semester. His midterm however, is brutal. I think the only way you can expect to do well is if you grind out the textbook and spend a lot of extra time, or are naturally good at chemistry.

Leznoff was a really energetic and passionate prof. Loved his personality as he was a fun and caring, however his midterm was tough due to the fact that he didnt do many examples. His lectures were interesting (most of the time) but most importantly he really wanted his students to do well and exceed. A quality that most profs dont have.

A very caring prof but focused his slides more on interesting chemistry facts rather than chemistry itself. Read and do the textbook q to have a better chance of doing good in the class.

Very likeable prof, midterm average was 47%, said they wouldn't curve it and definitely didn't;) Leznoff's Topics are difficult especially with lack of examples. DO THE TEXTBOOK QUESTIONS!!!! do not trust that the practice tests are the same as the tests! Loved the daily music and he explains general concepts well but expects you do the homework!

Dr. Leznoff is so passionate about chemistry and cares about his students. His music every morning was great! It's so sad people think that he is an bad prof due to the sheer difficulty in the first half of the course. His midterm was difficult yes but I think he did that for good reason. Just keep working hard, do loncapa and go to tutorial.

He was teaching in a cool and fun matter but the exams were so heavy and hard, they were not matching the teaching, as well as the homework's that we did.