Class was way hard to stay awake in. I self taught my material and got one of the higher scores in his class, a C. He ended up have to curve it do to how poorly everyone did. Nice guy, boring class.

One of my favorite professors. He is a very smart and funny old man. This class is pretty easy, but you do have to do a term paper. If you go to lecture, he tells you some things that will for sure be on the midterms. I loved this class!!!

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Horribly boring class and ineffective lecturer. He's hard to listen to for an hour and half and goes on regular tangents. Not recommended if you just have to take a GE.

Keller kicks ass! He is really cool and funny. The tests are a little tough but dont bother with the book, just study the notes.

Lectures are rather boring. I fell asleep everyday in class. Somewhat funny guy when I actually manage to stay awake. The textbook is useless (save yourself $120) and just get the AS Notes as the tests are mainly based off of what is said in lecture.

He is a lot harder for ES 144 Rivers upper division. Give you 12 questions and use 2 for midterm, heavily on project/fieldwork(50%), take home final. Sucks at lecturing and use his mess lecture notes online. Interesting topic, but a moderate amoun work

Go to lecture and section often and make sure to read and you will receive an A. He stives to make it possible.

Keller is sweet and teaches a wonderful geology course.

Prof. Keller is the man. He makes jokes. Is real funny, and loves class and his students. Calls everyone scholors and really helps out. He gives you questions to the midterm and final which helps alot. Nice Guy!

Such a great guy.

He's so into his work-its awesome!

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A wonderful teacher and a humorous man. It's always relaxing to be at his lectures. The tests and homeworks are fun and entertaining.

This class was awesome

Very animated and informative