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I took him for about three weeks and never understood a single word he said.

worst teacher ever. Had to drop cause i couldn't understand a single word.

stupid I didn't know anything he said with his accent. Don't take his class, worst, worst, worst...

i strongly recommend that you do not take this class. chang is horrible, he doesn't teach at all, his grading is inconsisten and you won't be able to understand one word that he says.

he was the most stupid teacher in the world.

Learn it on your own and you can pass... don't ask questions because he thinks only stupid people ask them and will yell at you and tell everyone else in the class that you're "du as ocks" if you can't understand him, that means dumb as rocks.

If possible stay away...He is okay after class, but during class DO NOt ask questions.He only observes and is not helpful. He starts off by grading hard and then as the class progresses he gives you some credit!

Worst teacher ever!!!! He doesn't help u when u need it. He English is bad!! He makes people feel bad and grades hard. Don't ever take him unless u wanna fail. He shouldn't be teaching period!!

this guy can't even speak english, let alone teach. he gave a quiz on his sylabus, which everyone failed. If you are late to his class he will lecture you in front of everybody about being late and he will count off of your grade, Don't know how this guy got hired. Horrible!!

Although I'm sure Professor is a nice guy in the real world, he is a terrible teacher. Yes he knows what he's talking about, but he cant teach it. Its extremely hard to understand him and If you want a quick lab, this is not the class to take, he lectures each lab class for an hour before you even get to start your lab. Very poor instructor.

He was a horrible teacher. He can't speak much english at all, yells if you don't understand him, and shouldn't be teaching. Do not take him for any Chem Lab classes !!

Very Annoying. He cant explain anything. He gets angry when people don't understand, and just makes wierd noises and taps the whiteboard harder. His accent is hard to understand.

Cannot decipher his words at all. He yells at you if you have a question or if you do not understand fully. He can't answer your questions until AFTER he has graded the lab work, and if he doesn't know the answer, he will dismiss you with a "You should already know this." He loses the work you have turned in then docks you points for it.

Will mark you down for answering a question not to his liking (regardless of having the correct answer). WILL MARK 1/2 OFF FOR SIG FIGS. He does not yell because he is mad, he yells because his voice does not carry. Not all bad. But don't take him. NOTE: Requires an $80-100 lab book, only uses a few labs, does NOT allow photo copies!

Do NOT take Chang. He is very contradictory, does not give partial credit and tests are VERY hard! His accent throws me off a lot of the time, and hard to understand exactly what he wants. The class is always very slow and he is not a fair grader.

Do not take chang unless you already understand chemistry and are an independent student. He is very hard and a strict grader. He is a professor who's suposed to "teach" but he doesn't. If you ask him for help or have any questions, he gets mad and starts rambling. Horrible professor!

This Professor is absolutely terrible! I don't understand how he is still teaching here. He marks 5 points off for writing in pencil (including math equations) and when you ask questions, he yells at you and even calls you stupid. I only took his class because I had no other options since all the other labs were full. Do not take his class!

Don't take his lab just gives exam on lectures instead of the experiments. Gets mad very easily. Very hard to understand has hard accent and speaks softly unless he is mad

Very confusing, impossible to understand. When you ask to clarify, he gets very upset and irritated. VERY uptight about sig figs and gives an hour lecture about pens, sig figs, and other picky stuff at the start of every class. Only 2 people passed the exams and he had to give out extra credit at the end cause EVERYONE did horribly in the class.

Easily the least approachable teacher I've ever had. He doesn't answer questions without yelling at you first and is super confusing when explaining the lab proceduresmaterial. If you're really good at chem and don't mind being in a room with someone ranting for 3 hours then go for it, otherwise steer clear

Prepare to have patience in this class if you want to remain sane and hope to pass. Dr. Chang is not very approachable and even made me cry in class once because I didn't understand a topic. Don't expect to get out early either, he keeps you for the full lab period, even if you are done with your lab.

If you can get past the accent and his odd angry behavior, he will help you. you must be there every single day, especially if taken during the summer. 5% given to your grade for 100% attendance. must learn sig figs or you will, as he might say "DOOMED." He is pretty passive too once you get used to his style, you'll find out he isnt so bad haha.

Honestly he's a horrible teacher. He expects you to know everything and won't explain a thing. I thought I would be able to handle it but he is honestly one of the worse lab instructors I've ever had. I had no choice between professors for this class but if I did he would be the last pick.

Professor Chang is condescending and screams at students who ask questions for clarification. He does not reach. He rambles, is very difficult to understand, and even when you can understand, he makes no sense. Worst professor I've ever taken.

Dr. Chang does not help or understand his students. He expects you to have learned everything prior the lab, and is very impatient. His accent makes his lectures near impossible to understand, his grading is harsh and makes no sense. He is super defensive about criticisms and blames students. Avoid if possible, otherwise, be patient and good luck.

Dr. Chang has a very heavy accent that makes him hard to understand. He is a VERY tough grader. But he does not always keep you till the end of class. Some people in my class did well with him but the majority of the class did not.

This is the WORST professor you will ever get. Super rude, not helpful, makes you feel bad for asking questions, and makes it seem like you are a burden to his life. If you have this professor I would advise you to change it unless you want to be pulling your hair out all semester. Grades are curved in the end.

My class asked multiple times to please go over the material again and he did it reluctantly saying that it's time out of our day and not his Although his class was awful and I passed it I do not recommend anyone else take it there are so many other caring and actually good professors out there who need full classes and Alison Chang is not one.

Allison Chang goes out of his way to make the class as hard as possible for every student. The material itself is fairly easy, but he will make you feel stupid for asking simple directional questions and is also very hard to understand due to his accent, constant yelling and rants. Do yourself a favor and take this class with anyone else.

Want a professor that says all assignments due on a Saturday then have random assignments posted throughout the week with no announcement. Blames students for his poor direction and teaching skills. Then this is the perfect professor for you.

This is the worst class I have ever taken. I am and have always been a straight A student and this professor has said countless inappropriate rude things to his students. After asking for help and being told you guys make me want to scream and use your brain I urge you to run for the hills and avoid this professor at all costs.