He wastes his time on demos that don't even work. Class is useless, the textbook is useless because he gets the questions from the test out of NO WHERE. He expects you to just know everything, when he is inept at teaching crap. Don't take him unless you absolutely must. or if campagnari is your only other choice.LOL

Really interesting lectures but his tests are SUPER DIFFICULT. Homework is much more challenging than the lecture material and the tests are completely impossible. His advice is to do the book problems before the test so I would do everything and I still ended up with a bad grade. The class isn't really curved, there's just a grade bump to help..

while he may be a good physics lecturer he makes his tests extremely difficult. you can do all the homework and problems in the book but he throws a curve ball at you on the tests presenting you with problems that are 10 times more difficult than the ones in the book/hw.

Geller's lectures are very interesting and he is extremely good at clarifying difficult concepts. The course will be extremely easy if you are math oriented, but not impossible if you aren't. Weekly homework from the textbook, i-Clicker during lecture. 90% of test material is from lecture. I got an A without doing much textbook reading.

Geller's great! His lectures are clear, and he keeps astronomy pretty interesting/fun. The class isn't that difficult if you start the homework early and if you have some interest in science/space. Make sure you understand basic concepts before tests. I never went to section and still got an A-. Still wish he curved though!

Seemed like a nice guy and performed some interesting demos in class, but other than that his class was extremely boring. Class was also very hard. there were weekly hw assignments that took a long time to do. i assumed all this work would prepare me for the midterm and final but those were still extremely hard. DONT TAKE THIS CLASS!!!

BEWARE: Geller is a nice guy and is very helpful. However, if you're thinking about taking Astro for a GE, don't. The class is VERY challenging. Attendance is mandatory (for clarity on complex concepts and iclicker). He gives weekly HW assignments and CLAS is absolutely neccesary. Class average for midterm was a D-/C- and he didnt curve.

Geller is awesome. He's funny, teaches fairly well, and keeps the class light-hearted. The material may seem a bit daunting at first, but if you read the book and go to lecture, it's quite easy and interesting.

Geller is the man. He does a great job teaching the physics series for bio majors - there is a good balance between conceptual and quantitative analysis. Finals are generally harder than midterms, but still very fair - if you know the material you will do well.

Geller was a good teacher. Material was a little hard but he made it much easier. Do the homeowrk and the class is fairly simple.

I found Geller very likable. He really seemed passionate about the subject. Although I found this class difficult, with concepts that were sometimes hard to grasp, I felt Geller was very fair with grading and his overall expectations. I did not find section very helpful.

Astro 1: Interesting class most of the time. Sections are optional and help sometimes. Pay more attention to conceptual ideas rather than math realated problems. Make sure to go to lecture because he does iClicker questions.

Class is easy if you pay attention and thoroughly complete homework. CLAS was very helpful. Geller is passionate and a good teacher. I am the opposite of a science student and I found his class doable and even interesting. He is laid back too, which is nice for a high-stress class

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.

Geller is a great lecturer who can really engage people in the material. He understands that many of the students are not physics majors, so he does make concessions for them. Tests are not easy, but are fair, as long as you do the homework and understand it.

I liked him up until he gave us a ridiculous final...and only ONE midterm???? Give us a break! I will be taking a different professor next quarter

I don't really enjoy physics so its made it hard for me to concentrate in this class. He is a very good teacher though and although I never passed a test, I still ended up passing the class. He curves when necessary. He's a nice and fun teacher. I, actually, enjoyed lectures.

His lectures are very useful, attend every lecture. His tests are fair and there is a curve for his class.

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

I really don't understand why he has good ratings. From the first day he set us up to fail, letting us know that we probably wouldn't get into grad school if we didn't pass the class. He's a horrible lecturer and I couldn't follow anything he said. Take CLAS.

Gellar is awesome. definitely reccommend taking him for the whole physics series. very fair and understanding- changing due dates if he feels we are too busy. Makes class very fun and interesting. In love with rockclimbing and has crazy hair... haha