I had him for Astro. Great professor interested in the subject and makes his lectures very interesting. Important to attend every lecture. Understanding concepts is more important than knowing the math, although there's still math. CLAS helps. His tests are pretty straightforward, just study.

Geller is extremely helpful and clear. He strives to make certain that he is clear about what will be on the exams and gives a fair review before every test. It is very very important to go to class and take notes and later study the notes while doing homework. He is also very sociable and enjoys visits from students who are truthly interested.

Geller is awesome! You should definitely go to class if you want to do well in the class and you should make sure you understand the homework problems for the tests. I didn't do too well on the midterm but did well on the final to get an A. The curve is really helpful!

Even if you understand the homework, tests can still be difficult. He throws random problems that you've never seen before and assumes you can just figure them out based on what you've learned. Class is useless because the things he teaches really don't appear on the exams. I had better physics teachers in high school.

amazing teacher. learns from other people's questions and incorporates them into his next years lecture. Patient.

Physics 6B is a much harder class that 6A. Material is simply more difficult to grasp and apply. Geller is a good teacher and makes the class much easier than it could be. He cuts out a lot of material that he knows most of us bio majors won't ever use. Definitely take this class. Not stressful at all

Of the entire Physics 6 series, 6C was by far the easiest. Nuclear physics was somewhat interesting.

class is SO easy. take him, easiest class i've ever taken in college!

Did a lot of demos and had clear lectures but has a tendency to give questions on tests that were not like the homework,lecture,or book (well for the final @least).He really makes u think.Physics is an interesting but complicated.He was a good professor, the best of all the physics prof i've had (3). He's pretty cute too, looks like a grad student

Geller is a really cool guy..i went to all his lectures because they ARE really entertaining and you will definitely stay awake.he COULD improve on his teaching but its cool to see a professor that is passionate about teaching.He's not there to hold your hand so dont be a wuss,and just read.oh,and homework SUCKS but its the same for all professors.

Geller is a cool guy but his teaching is seriously flawed. His lectures are conceptual but his tests are difficult mathematic problems that are poorly written. You have to teach yourself the concepts or you will fail. attending class is often pointless since all he does are demos: entertaining but not helpful for the home work which takes forever!

geller makes it easy to pay attention in lecture since he loves teaching. he does a lot of demos. however his tests are a lot harder than the homework and the example problems that he does in class.

whoa he does a lot of demos! so what?!! they are useless. he is useless. he does not teach a thing. he is the worst professor i have had. it's ridiculous when he tries to explain things bc he can't if his life depended on it. his book sucks too. why? bc he wrote it!!

After his ridicluous midterm, I realized that I do not like Geller. Yeah, the class is entertaining, but he doesn't teach anything and you either have to learn it all from CLAS or from the book. His tests don't test you on anything he actually taught, so be careful

He hasn't been writing as much on the board and is doing more demos since he received his teacher evaluations. Class is like watching an unrehearsed version of Bill Nye the Science Guy where some of the demos don't work.

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geller rocks

Way better than Fygenson. Very fair and good at explainging concepts. Tests are very fair. Easy to get a good grade with little studying.

great professor, fair exams, kept his physics class as interesting as one could hope to find an introductory level physics course

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Geller is an awesome teacher. The tests were really straight forward. Some multiple choice and a few write out probs. Usually 1 prob. to weed ppl out. makes lectures interesting & aplicable. the only complaint is that he does very few actual examples probs. in class, & more conceptual stuff. Would recommend.

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He is a very enthused professor. LOVE LOVE LOVE his demos. always made it to class because of his demos. exams are very hard for phys 1, phys 2 was a little easier. hw is hard too. but you can get away with these by going to CLAS or going ot him for help.