Very professinal, amiable, very entertaining. Enjoyed lecture. Difficult exams, but nothing unreasonable.

Dr. Chang is very friendly and explains concepts and problems well. He is also helpful when he comes through lab. His exams are very difficult - the class average for the first exam was a 46. However as a lecturer, he is very good and helpful.

Dr. Chang means well, but definitely hasn't grasped the ability to teach well at all. You absolutely have to print slides even if you usually take notes because he moves through them so fast. His quizzes are hard and exams are nothing like the practice exams. First avg was a 47%. He gives you no time to absorb what he "teaches" at you.

Dr. Chang is a super nice guy but honestly, I learned more reading the book and doing the problems on my own than from lecture. Exams and quizzes are really, really hard.

He's a nice guy. Kind of hard to follow during his lectures, b/c he literally FLIES through his powerpoints...if you prepare for his lectures and review after lectures, it will help alot. so definately spend lot of time for his class..first midterm's avg was 55%

Dr Chang is a good and very intelligent man. However, the class was incredibly difficult. I ended up with 2 A's the quarter, and I got a C- in this one. There is a reason why the Chem department at OSU is notorious. Simply put, this class is hard, and the tests are impossible.

Very good professor. For 122 his notes are your life. Does tons of problems on board and is very helpful during office hours. GO TO LECTURE, a little hard to understand sometimes, but overall very good. Tells you exactly what types of problems will be on tests and quizzes.

Dr. Chang is a nice and helpful professor. He usually just reads his notes in class, so you can just get the same information online and not have to attend lecture, especially if you're familiar with the material. The exams and quizzes were unpleasant, so it would've been nice if he had homework grades to balance those out.

Good Professor. His notes and lecture slides are your study guide. Sometimes uses example from lecture in his quizzes and midterms. Very tough midterms. Average was a 53% on Midterm I. Work hard, study hard, go to lecture, do a lot of practice problems, and you will do well in his class.

Dr. Chang is the most organized professor I have ever had. He is always well-prepared for lectures. I would highly recommend him.

The guy's hilarious and enthusiastic about his subject. Format the information's presented in isn't very helpful. Quizzes are easy, midterms are pretty tough and very different from the online practice, lots of minute details, but they're also curved a ton. as long as you prepare for the labs they're not bad and not much work outside of labs.

This was probably one of the hardest classes I've taken at OSU but Dr. Chang was easily one of the best professors I've EVER had. I learned so much from his class and his enthusiasm and love for teaching and chemistry were beyond infectious. He was extremely clear and taught extremely well!

Overall a great teacher. Very devoted to his work and interested in seeing his students succeed. Bottom line, if you put the effort forth to pass, you will. If you think you can coast by and rely on the curve, you may get lucky and pass but your GPA will more than likely suffer. Study his practice midterms and finals, some q's in exact format!

Very helpful professor! Gives many example problems in class and keeps that class interesting and durable. Often times he stars questions which will be on the midterms/final and overall lets you know what you need to know. Great professor. Very helpful. Would definitely recommend to take

A very difficult class, but a great professor. Always willing and wanting to help his students succeed. Often criticized for having outrageous tests that are impossible to study for. It's true his tests are difficult, but he tells you precisely what to study and tests off his notes. It's really not that hard to know what will be on it.

Chang is a good teacher, but it's very hard to get an A in this class. You must go to class every day and take notes, he'll give you hints in class for tests so make sure to pay attention. Overall good teacher, just a difficult class.

One of the best profs I've ever had. OSU should hire more people like Dr. Chang who really cares about students. I worked 2 jobs to pay for my tuition and I feel my money is worth it because this guy cares about the course. If you just want to get an easy grade, he is not your option. If you really wanna learn, I'd rec him.

Dr. Chang is a great professor. He is genuinely interested in helping you and came to class prepared and organized. His notes were easy to follow and clear. He is not necessarily easy, but if you pay attention to what he tells you will be on the test you will do fine. I never once cracked the text book and did well in his class.

Hard class, but Dr Chang does his best to make it easy. Willing to go the extra mile to help students comprehend the material.

Funny lecturer, but the first exam was quite hard. Later, he made the exam easier to help the grade. He's a fan of Buckeye's too!

Dr. Chang is a great professor: he teaches the material very well and really cares about all of his students. If you put in hard work, keep up with the material, and ask questions you will do very well in his class. His exams are very fair and going to lecture will really help you succeed on his exams.

Chang is awesome. He is very interesting in lecture and makes jokes. His tests are hard, but if you take the time to study you'll be fine. Lecture is not mandatory. I skipped over half the lectures and still got above average on every exam.

Dr. Chang is definitely an accessible professor; he answers emails and stays after class to answer questions. His tests are very difficult. However, he does teach by the book & lectures slides. To get an A, read the book, know the slides, know the notes, and be able to answer end of chapter questions in the book. Hardest examples appear on exams!

Great instructor, works hard to explain the material.

Dr. Chang is a great lecturer. He repeats things more than once, and he is very helpful during office hours. Do all of his problem sets multiple times before exams, and study for the recommended amount of time (15 hours per week). The exams are hard, but very doable. Just know your material!!!

Such a good professor! He's very helpful and his exams are extremely fair. Just STUDY! If you don't study organic chem and get a poor grade it's your own fault, especially in his class.

Very helpful teacher. Makes things clear and easy to understand. Exams are fair and similar to practice exams. Attendance is recommended. He gives you descriptions on what he expects you to know for the exams. I was never good at Chemistry, but I was able to do well in this class.

He is a very nice and approachable professor, and has a very organized set up to his class. his notes are very helpful and clear.

Dr. Chang was a VERY good professor for ochem. He was super approachable and it was obvious he cared about his students and how they were doing in the class. His exams were hard, but completely fair. He also had a lot of opportunities for us to get extra credit, which was super helpful!

Great professor who really cares about his students! Very willing to help. His office hours are very helpful and lectures are definitely worth attuning. Overall great professor!

Dr. Chang is a great professor. He really cares about his students and their success in his class. The material is very tough but he explains it as clearly as possible, do the problem sets and study his notes front and back and you will do great!

Excellent professor who is always willing to help. His midterms are tough but if you work hard on his materials, you will do perfectly fine. Make sure you score his extra credit opportunities in which you'll be required to correct his 'lecture mistakes'. Don't be surprised that these bonus points will boost your final grade.

Dr Chang is Awesome. His lectures are very thorough and in-depth. His exams and quizzes are difficult but he provides his old tests and quizzes which we HAVE to do in order to succeed. His lecture notes are way more important than the book.

Okay, so I didn't do well. I got a C+, but I had to do a lot of extra credit to get it. This guy challenged me and made me work my butt off. If I studied more, I'm sure I could have gotten an A. He's sometimes hard to understand but always makes sure to correct himself to get his message across. Cool guy, and he sometimes stressed more than we did.

Chang is super helpful and a very good professor. If you attend lectures and do all the recitation problem sets and HW you will receive a fair grade in his class. He gives a lot of opportunities for bonus points and runs the class well.

Great professor, very tough class. O-chem is difficult, but prof. Chang is by far the best professor to take at OSU, he offers the most extra credit, and he cares a ton about his students and making sure they understand the material. He also provides lots of extra materials (problem sets, notes, etc.) to give students ample tools to study with.

Dr. Chang is extremely approachable and eager to help his students be as prepared as possible for everything that comes at them. His course was wonderful!

Dr. Chang has definitely been one of my favorite professors so far. He worries more than the students sometimes about their grades and is very clear. His class is challenging, but if you use the resources he gives you, the class is not a problem at all. He makes O. Chem super interesting and cuts out all the unnecessary material. Would recommend.

Dr. Chang is the best ochem professor at OSU. A ton of extra credit, a lot of practice problems on Carmen, which no other professors offer for their students. Big curve at end of class. Tells you exactly what will be on the midterms and final. Doesn't put anything that isn't in his notes. Do not skip class. Start studying a week before the tests.

He is crystal clear in what he wants you to know for midterms and for the final he gives a deatiled breakdown of the things that are on the final. In additon for the midterms he tells you in class exactly what is on them even telling you that specific examples verbatim are on there. Up to 120 points of extra credit. Easy A if u do the work.

Attend office hours and it will change your grade. A great guy who really cares about the material, pay attention to his lectures!

Chang was an amazing professor. I thought his handwriting was neat and his notes are point on. Lectures are very helpful. He is very eager to help students and wants them to do good. Exams are pretty fair and not difficult if you study and prepare for them well.

Dr. Chang is my favorite professor here at Ohio State. He genuinely cares and wants to help out his students. He gives out tons of bonus, around 100 points. He makes the lectures very interesting. Don't listen to what people say about his clarity, he goes fast at times but he is clear on what you need to know wait a semester for him if you can

Dr. Chang is one of my favorite professors thus far. He is incredibly helpful--office hours are invaluable and he also presents plenty of study materials. This is by no means an easy subject but if you put in the time, Dr. Chang will make getting a good grade possible. Bonus: he gives A TON of extra credit.

Besides his accent he is very clear and explains concepts well. Holds lots of office hours, highly recommend to go to as many as possible. Gives extra credit on exam and does lecture mistakes that are worth extra credit. Going to class EVERY DAY is a must to do well in his class. The book is not 100% needed, but at least know someone that has it.

Dr. Chang really cares about his students and wants to make sure they understand the topics. He offers a lot of extra practice and handouts on Carmen. Exams are fair. I took entire weekends off to prepare for his 2 Monday midterms and just repeated practice problems over and over. There is also extra credit. He's a funny guy and made ochem fun

Dr. Chang is a very fair grader. He tells you what to expect on the exams and gives you materials to succeed in his course including a lot of practice problems. He is entertaining in lecture. He even gave out free frosty coupons to people who answered. Overall, great professor, very helpful. Would take again. Love this man.

Dr. Chang is one of the best professors I've had so far. In the beginning his accent makes understanding hard but you get used to it fast. He is unambiguous about what's going to be on the exam, gives a lot of extra credit and genuinely wants to help his students succeed. He is sooo hilarious in class. LOVED HIM

Dr. Chang is amazing. He's funny and really cares about students. He offers extra credit opportunities and helps students whenever needed. He also asks for questions at the beginning, during, and end of lecture. I've learned a ton more from this professor than I have from any chemistry professor. Attendance is not mandatory, but highly recommended.

Dr. Chang is easily one of my favorite professors ever. He is really funny. He would always come up with funny analogies that make the chemistry make more sense. GO TO OFFICE HOURS!!! He gives out a lot of extra points in recitation and his exams are tough but fair. You will earn the grade for the work you put into the class.

Great professor, lectures are down to earth and Chang makes things easy to understand just make sure you pay attention and take good notes. Gives lots of resources to students and always there for your success.

Probably the best Ochem professor there is. If you have a chance, definitely take him. Super caring and makes the class hilarious yet informative.

Dr. Chang is an amazing, funny, and helpful professor who wants to see his students succeed. That being said, you need to attend lecture and write down ALL of his notes because his exam questions come directly from the lecture notes/examples. Go to office hours; you will get lots of help and hints from him. There is extra credit offered as well.

Very kind and caring professor, in my opinion one of the best ochem professors you could have at OSU. Wish I could have hime again for 2520 just wouldn't work for my schedule :/

Ochem is a hard class and Dr. Chang does his best to make it better. He genuinely cares about student's and does anything he can to help. His notes are very detailed and only available in class if you attend it. Don't skip class! Go to office hours for help. He really cares about you.

Fantastic teacher. Tons of practice problems. No surprises. Always available to help.

I loved having Chang for ochem 1. The tests are hard, but the problem sets and recitation activities he gives you are really good prep. If you know how to do those, you should be fine. Go to lecture because he doesn't post most of his lecture notes on Carmen. Very accessible - has multiple office hours a week and works one on one with you.

He keeps tests as fair as possible and avoids ambiguity or exceptionally tricky questions. He REALLY CARES about students and is willing to do anything to help you understand the content. A downside of taking him is that he's not very good with explaining some ideas as he isn't very good with words.

Dr. Chang provides all of the resources you need to do well in the class. If you consistently review your notes, the recitation packets, and the problem sets, it is definitely doable to get an A. Compared to other Ochem instructors at OSU, he is much more straightforward and he is also pretty funny as well and keeps students fairly engaged.

Dr. Chang teaches a tough class and has high expectations, but he does his best to help students be successful. His lectures are clear (no textbook needed - he gives you all the info and practice problems that you need). He also is very helpful in office hours. He expects students to put in the work, but he will do whatever he can to help.

Dr. Chang is one of the most caring professors I've had thus far. He is so helpful in office hours (which I highly recommend attending) and is great at explaining things in lecture. He also gives a TON of extra credit for those who participate in class and recitation. He has high expectations, but he makes it easy to succeed in this class.

Dr. Chang is a great professor. As tough as Organic chemistry is, he truly makes this class as fair as possible. This is shown through multiple ways such as how he gives extra credit and numerous amount of practice problems. Although, I will say that his class is very lecture based so skipping them is not a good idea.

Organic chemistry is hard, but Dr. Chang really tries his best to make it as understandable as possible. He reads multiple textbooks and summarizes the information for you in a clear way. Go to all the office hours you can, too! He's really personable and wants you to succeed. The curve was kind but you do have to work for it.

Dr. Chang is the best combo of a great professor from whom you'll learn a lot, and easy grading criteria that you will find in from an Ochem professor. Dr. Chang gives weekly extra credit, and many of his exam questions come straight from quizzes and homework. His class is still a lot of work, but take him at all cost if it fits your schedule.

Dr. Chang is the best!! Such a caring guy, who genuinely wants his students to succeed. A lot of the test questions are very similar or identical to past quizzes and worksheets and lecture examples. So if you study, you will do well.

Dr. Chang's lectures were very organized. Lecture is extremely important and I don't think you could do very well in the class if you didn't go to lecture. Practice exams are very helpful in preparing for the exams. Dr. Chang is EXTREMELY straightforward in what he will ask you on the exam.

Dr. Chang is honestly awesome. I retook this class after failing with Callam and Dr. Chang's exams are EXTREMELY reasonable. He tells you what's on the exam and the questions come from his question sets. Aside from that, he's kind, wants you to succeed, & makes time at the beginning of class for questions. Also, good curve!! TAKE HIM!

Wallah my favorite teacher. I hate my teachers now I would retake his Ochem class again just for fun if I could. He made me love Ochem

Amazing! Best ochem professor at OSU. English isnt perfect but he does his best to speak loud/clear and repeat things multiple times. Gives funny analogies to help students understand reaction conditions and mechanisms. Very fair and genuinely wants his students to do well. Lots of study resources. He makes sure hard work success in his class.

Dr. Chang is the best ochem prof at OSU. Eventhough he has an accent, he teaches the material very well, is very nice and funny, and his test questions are very clear and straightforward (unlike other professors). He also gave us extra credit and had a lot of office hours.

Easily the best professor I have ever had. I took 2510 and 2520 with him and he does an amazing job at taking very abstract and difficult concepts and breaking them into memorable metaphors. Be prepared to easily spend 10+ hours a week on Ochem alone, especially 2520. Exams are hard and make you think, but he draws mostly from practice materials.

Organic Chemistry is a very difficult class. Dr. Chang gives lots of material to help study and he is very helpful during office hours. His exams and quizzes aren't too hard. I recommend practicing the old ones he gives you for practice as well as the recitation activities ;) The TA's can be somewhat confusing on some things so go to Chang first.

Dr. Chang is great and I felt like I really understood ochem concepts because of his teaching. Aa long as you attend all lectures and do the homework and practice you can do will with him.

Dr. Chang is a good guy and a caring prof. He really wants you to succeed, and gives you the materials to do so, which is why I chose to do both semesters of ochem with him. My only complaint was that his pre-covid practice quizzes/exams did not prepare you for his online exams, though I definitely see why the online versions had to be harder.

Dr. Chang has to be my favorite professor I've had in college. He is definitely not easy on his students, but it's for a reason. He gives everyone an opportunity to succeed, but makes you work for the grade you earn. His classes tend to have very smart people so it gets competitive. Such a fun guy though, I can't recommend him enough.

Dr. Chang was a great prof who truly cares for his students. He tries his best to prepare everyone for the common exams, which are about the same level as his quizzes and recitation worksheets. His lectures go fast but go to office hours, read Ochem as a 2nd Language, and watch lots of youtube videos. Also lots of extra credit with recitation!

Great professor. Although lectures can go pretty fast, if you prepare beforehand you'll be okay. He values helping his students very highly, as long as you are putting in effort. The class wasn't easy, but no orgo chem class will be. I highly recommend him.

Dr. Chang has been my favorite professor at OSU! I had him for both OChem 1 + 2. I was very worried about OChem given its rep, but he made things fun + easier to understand. I enjoyed his lectures + he was always willing to make time for students in and out of class. His quizzes/exams were fair and he is quick to regrade + correct mistakes.

Dr. Chang is one of the best professors I had at OSU. Wish I had him for Ochem 1. Wants to see his students succeed and emphasizes he wants to see who really studies in the class. With the vast amount of practice he provides you, you will see much of what he wants you to learn beforehand and will feel better about going into quizzes and exams.

such a sweet man. Gives a lot of extra credit and tells you exactly what is on all of the exams before hand.

dr. chang is the best ochem professor at osu by far. all my homies love dr. chang

Great professor who teaches the content in fun, memorable ways. 2 midterms and 1 cumulative final. No hw except for wkly recitation worksheet (only graded for extra credit). 8 recitation quizzes and 2 lowest are dropped. Very fast-paced so definitely have to put in the work outside of class to succeed. Vry accessible in office hrs and outside class

I got a B+ in this class. I was 2% away from an A-. Had I not thrown up during the 2nd midterm, I believe I would have gotten an A-. Dr. Chang is an amazing professor! He has an accent, but he is absolutely hilarious in class. Out of all the professors at OSU, Chang is the easiest, no questions asked. Curve is amazing!

I got an A- in this class. Dr. Chang curves 25% of his students get an A/A-, which is a lot higher than other professors. My advice? Start studying early. The first day you get to class is when you start studying. Also, so every problem set and recitation worksheet. I promise that if you do & don't give up, you WILL get an A with Dr. Chang.

The best prof you will ever have and will make you love ochem if you hated it from ochem 2510.

Dr. Chang cares about his students and truly wants them to succeed. The only downside to his class was that he doesn't provide recorded lectures so you do have to go to class each day. Watch YouTube videos, take your own notes, do all the practice material Chang provides, and try to stay on top of the content. Ochem is very manageable with Chang!

Aside from how easy he makes understanding ochem and doing good in his class, this man is amazing! I have had several issues related to this class and have actually, embarrassingly, cried in front of him several times. He sat down and spoke with me about how to help myself. I don't know a single professor who would do that for a student. Take him!

Dr. Chang has an amazing curve. If you do all the recitation activities & problem sets multiple times, rewrite your notes, and practice daily, you WILL get an A. For future reference, a 73%-82% this semester was a B+, which is a pretty good curve! He Automatically makes the average a B-, and curves at least 25% of the class to an A. You got this!

Best OChem prof especially if your goal is to get a good grade. Go to every class, take clear notes, and you'll pass. Grade is just based on exams and quizzes, with recitation packets for extra credit, which I liked (no time sink online HW). The exams weren't that difficult, and he prepared us well ;) Wish I had taken him for OChem 2. TAKE HIM.

Dr. Chang is a great professor. Just make sure that you study every day and you'll be fine. There are weekly quizzes so prepare for them. Extremely approachable if you have any questions. Exams are relatively straightforward if you prepare.

Dr. Chang is very fair, and very straightforward. Especially compared to other orgo 2 lecturers, he really outlines what you need to know for his quizzes and exams. Orgo 2 was absolutely doable with Dr. Chang. However, do not expect any sort of curve for his class, as his exams are fair enough where a curve is not necessary. Know the lecture notes!

Does his best for students.Weekly recitation quizzes worth 40 points. He also allowed students to get 5 extra credit points for worksheets based on completion each week. Exams were difficult but he was very straightforward about content. Lots of problems came from practice resources given. This year the curve for a B was at 70.5% and 78% for a B+.

No lecture recording, so go to class! Dr. Chang is an enthusiastic teacher. It is the way the course is set up that there are a lot of materials we need to memorize in a short period of time. I don't like one thing about his teaching style that he goes into detail without explaining the big picture/context. Be ready to study on your own for a lot.

If you're aiming to get the best possible grade out of all ochem lectures take this professor, but class is still very difficult. Your grade will consist of quiz and exam grades, with some extra credit. Very generous curve, so even if you don't do well on exams you'll probably pass. Focus on recitation worksheets and problem sets for exams

Stop scrolling and just take this professor already. As long as you put in the work you'll be fine.

Dr. Chang is one of the best professors I've ever had. I had him for 2510 and 2520 and he definitely made organic chemistry understandable for me. I recommend taking him! Be sure to always attend his lectures since he mentions how he structures his exams. Good luck!

I think Dr. Chang does one of the best jobs regarding how difficult the content of this class is. I wish he recorded his lectures because missing class can be detrimental. He's caring, funny, and wants to help. The exams are based mostly off of his practice problems and recitation worksheets, which is helpful.

Very transparent, straightforward, no-bs guy. He makes it very clear what he expects of you and how you should prepare. It's not an easy class but he is not out to get you or trick you in anyway - his mantra is simple, you follow his plan and put in the effort and you'll do well. Relationship is 2 ways tho - you put in effort and he'll be there.

Dr Chang is my personal hero. Never in my life have I had a professor give everyone a 40/40 on a quiz because osu beat the team up north. Not just that, but his lectures are really good. No matter what people say about his lectures his answers are always in the notes I have found. Attend all lectures + office hours. Office hours was a life saver.

When I was looking at RMP prior to last semester, I saw many ratings that said he was bad for students that have SLDS. The only reason I am writing this review is because Dr. Chang was nothing but accommodating for me. Yes, 2510 is a hard class, but I am very happy I decided to switch into his section.

Dr. Chang was an amazing lecturer! He doesn't record lectures so you have to come to class to take notes, but he explains most things very clearly and uses fun analogies. Quizzes weren't too difficult if you had done the recitation worksheets + practice quizzes + reviewed notes. Exam questions are very similar if not directly taken from practice.