the guy should be fired for abusing students, UCSB admin I hope you are reading this and this guy needs to go. There are plenty of good prof. out there except him, no direction in class, mood points, disorganized, and does not know the content but pretends that he does. A complete joke, who hired this guy, he needs a class in manners.

Professor Kahn is a very difficult teacher. He's also the only teacher who will give you access to concise explanations of extremely complex and theoretical material. You are not disillusioned if your reason for taking his class is to have an opportunity to use your knowlege set to look deeply into chemistry. You are if you think A+ is ab initio.

I was enrolled in the biochem lab series with Dr. Kahn for the entire year (3 quarters). He is VERY TOUGH and my mental health was the lowest it has ever been. However, you do gain A LOT out of this series. He always challenges you and pushes you harder than any professors ever will.

I am not exaggerating when I say he is by far the worst professor I have ever had in 4 years of college, and probably one of the worst humans I have ever had to interact with in my entire life. There are hard professors sure, but he is more of a billeting jerk who tries to make students feel stupid compared to him.

This guy is pure evil. He clearly does not want to be here and is taking it out on his students. He has a constant need to remind us of how dumb we are compared to him, even though this is our first time being exposed to the material. His classroom environment is abusive. I dont know how he gets away with this stuff. Dropped the course! NT!

Honestly, I enjoyed having Kahn as a professor. Yes, his courses are very challenging and yes, he'll push you to your limit but he cares about his students and about learning. Work hard as he likes this and is very approachable! Don't listen to the negative hype and be your own judge.

I was enrolled in Dr. Kalju Kahn's three-quarter lab seq. during the 2014-2015 (3 Qrts), and 2015-2016 (2 Qrts), academic year. I was brought to tears, and later disqualified from school. He took the time to walk with me, find the source of the adversity, and unexpected sponsored my readmission. Fixing sometimes requires being broken. Ty KK & MB.

He will make your life miserable. If you're a Biochemistry major I'd sooner suggest changing majors to Molec. Biology than taking his class. His method of "teaching" is to act flabbergasted whenever asked a question and wants you to read his poorly written (by him) teaching manuals. I tried my absolute hardest and went to his office several times.

He expects a lot from you. Hard as all get out, but he expects you to do well which is refreshing and inspiring. Put in the work, meet with him in his office, go to class and be prepared. One of my favorite professors even though he was tough. Half our class dropped by the midterm, but he teaches you how to learn, which is really why you're there.

Only take Kahn if you need to. He relies on online lecture videos from Gainer and other online sources to teach the class. He expects you to learn all of the information before coming to class. Quizzes and tests are hard. He gives you too many resources expecting you to use all of them. Upside is that an "A" starts in the 70s.

He enjoys torturing his students and making his students' life miserable. DO NOT TAKE if you are not going to be a professional chemist!! The quiz questions are something you CANNOT find in your textbook. And he expects you to have 100 hours every week to study for his class and it's IMPOSSIBLE.

Dr. Kahn is a brilliant professor, and is likely one of the smartest people you will ever be around. The secret to Kahn is making sure you know his material. Read the theory manual. It is written in a conversational manner,and contains the answer to every question he will ask in class. You need to prepare. Don't be afraid. He can see the effort.

He's very stimulating in lecture, and frequently asks the audience questions which enhances attention and learning (in my opinion). His homeworks can be quite long, and your research skills shouldwill be definitely sharpened, but the questions are very interesting. Tests are pretty fair.

He is obviously one of the most intelligent people I've ever met. He was relearning organic chemistry from the same textbook the students used, and he found a couple of errors in the book. His vitamin pop quizzes are nearly impossible. The exams are overwhelmingly difficult, thus my 54% turned out to be a B+.

Hardest professor ever. Will push to the limit. prepare for days and nights of study.

Unless you plan on becoming a biochemistry researcher in the future do not enroll in the biochemistry major in the chemistry department. If you are looking to become a doctor in the future spare yourself the pain I had to go through and just become a bio major and keep your GPA. Before Khan's series of classes I had a 4.0, now I have a 3.7.

Note: Only take CHEM 111 if you are serious about learning how to analyze real chemical kinetic data computationally. This is an excellent course that will teach you a lot and leave you with great, practical materials to use for analyzing kinetic data, but know that it is a hard, fast-paced class with heavy use of Mathematica.

Great professor. He certainly has high standards & expectations, but he puts a lot of time & effort into the class materials to help you. He appreciates when the class is prepared & participates in discussions & will call on people if it gets too quiet. Don't be intimidated by him though, he is extremely willing to help any student who is trying.

He is a difficult professor who needs to work on his professionalism with students. His intimidation techniques are hurtful and discourages students rather than motivate them. His attitude does not allow students to feel comfortable while learning. There are many flaws with his "teaching" style.

I have taken 3 lab and 3 elective lecture courses with him. You will have to work very hard in his classes and do loads of preparation, but you will also learn so much and will realize you are capable of exceedingly challenging work! The assignments and tests are heavily focused on problem solving, which I enjoyed. Don't be intimidated by him.

This professor is difficult to approach. He teaches in a very confusing manner and is many times unclear. He is also not friendly which makes it hard to ask him questions. He expects you to do a lot of work and doesn't hesitate on embarrassing you in front of the whole class if you are any less prepared than what he expects. Overall horrible.

This guy is a walking textbook or encyclopedia and will expect you to become the same. His classes will push you further than you may like but you'll end up better because of it since you really get a lot of practical experience with him. He also has an open door policy when you need help; so if he's around he'll give you help.

one of the hardest biochem professors in the department. He is very demanding. Be ready to spend day & nights for his lab reports and pre-labs!! He is hard to understand because of his accent. he screwed me up in the last quarter of my last year. HATE THIS GUY!!!!

He hadn't taught 109c since like 2007 so he was definitely rusty with mechanisms etc but still really enjoyed the class. His tests can be ridiculous but he curves generously. also gave explicit study guides... super chill!