Super super helpful!(also super hilarious and entertaining) Always asking for class input on how he can explain topics best. Highly recommend him. The topics covered in class are complicated but he explains them extremely well. Could not imagine a better professor!! TAKE HIM!

This professor is awesome! He super energetic and loves what he does! Although, bio 105 is pretty hard; if you don't ask for help you'll be in trouble.

He's super goofy! He makes class exciting and tries to explain everything so that everyone understands. He's great!

Barrett is super awesome! Although some of his teaching methods might not be for everyone he is really a fantastic guy! He loves seeing people in his office with question about the material! He really makes the class interesting! If you have the chance take him!

I was not satisfied with this class. Klein is a really nice and fun guy, but it was distracting when I was trying to learn in lecture. He did not cover all the material in class, so read the book even though he says it's not required. He only teaches the basics but asks all application questions on tests.

Klein is a very funny and interesting guy who is passionate about biology. However, he doesn't go into detail sometimes in class about things that are on the test so I recommend reading the book. He is very picky on tests and doesn't give points back often. His lectures are very interesting though and he gives a lot of examples!

Very funny and entertaining guy. His laugh is the best. He does go on tangents unrelated to the content quite often. He uses a lot of examples to describe the topics. His test are hard though. He goes over general concepts and asks for a lot of application stuff on the test. I enjoyed the class though, he is very passionate about the Biology.

Dr. Klein is very passionate about biology. He made it fun and interesting. It was easy to learn concepts because of all the examples he used. His tangents enhanced the material. Didn't need to read book. Explained things clearly and wanted everyone to understand. His tests aren't harder than any other professor - they're the same.

Klein is a really entertaining professor that knows what he is talking about. He is very good about keeping the class involved in lecture. He likes to have comprehensive questions to make sure that the class is understanding and is always taking suggestions about how he can do better as a teacher.

The class sucks, but he is awesome! It's a very difficult class, but he tries his best to explain thoroughly and make it interesting. I emailed him a lot throughout the semester and he was very willing to help. I had him for lab as well, and although the lab was incredibly stupid, I will ALMOST miss it just because of him.

Great prof, really makes Biology interesting. He is very accessible and can answer any question related to the class or bio in general. We didn't really use the textbook in class. He uses a lot of iClicker questions, which are awesome and great test prep. Tests can be tough, but aren't too bad as long as you grasp the core essentials.

Great professor. Extremely passionate about biology. His funny sense of humor makes it a lot easier to pay attention in class. I will be taking him for any other biology course if I get the chance.

Best biology teacher I have ever had. Incredibly knowledgeable about all aspects of biology and really gets people engaged in his classroom. Tests are comprehensive but just show up to class and study the power points before hand and you will do fine. Also has plenty of homework so not all points come from the tests which is nice.

Great guy! He really cares about his students and is always there to help. The material gets dry sometimes, but he keeps students interested. Tests can be somewhat difficult, but the material comes directly from lectures.

Dr. Klein is an amazing professor. He is clearly passionate about the subject and he clearly loves teaching. Organismal isn't overly difficult. Know your phylogenetic trees incredibly well and you should do great. Dr. Klein is a great choice for the class.

Klein teaches more upper level classes so BIO 105 can be a bit tough. He does a good job of explaining the material, but doesn't give many real life applications which are what ALL of his tests consist of. Good luck on the second test. After studying for hours I got a D after him padding the grades. He's passable, but don't expect an A.

Klein really loves his subject and you can tell from his lectures. Don't get him started on insects though, because then he won't stop talking. You have to attend lectures, otherwise you won't pass. Study a ton for all exams, you'll need it (2nd exam is a killer). If you're willing to work on the material a lot, you can definitely get a good grade.

He is a great professor for biology. He knows so much and he emphasizes the important things that you need know for tests. Yes, tests are hard but you should expect that going into a biology class. If you get the chance definitely take his class.

Klein is hilarious, between his laugh and his clothes with insects on them he can put a smile on your face. He emphasizes which slides will be most important for the test. His tests are hard in the fact that they cover all of the material learned but they are fair. He holds review sessions before each test that are very helpful!

Great professor! He is focused on you learning the material as opposed to being all about the final grade. I highly recommend!

Bio in general is a tough class. Lots of studying that needs to be done outside of class. There are weekly online quizzes & there are a few group projects. Prof. Klein is legit Bill Nye! He loves science & you can tell, but it is a good quality to have in a Prof. If you put in the time to study, you should do fine on exams! But lab is the worst...

He is a very smart and helpful guy. Knows what he's talking about. But, his tests are tough-- be aware of test #2!!! 10 online quizzes, but they aren't very hard. Puts every powerpoint lecture online.

Lectures are important to attend, and a lot of information is covered in short amounts of time. Exams consist of problems with varying difficulty; some questions are pretty easy, some include very small details that are easy to miss. Encourages critical thinking and application of course material, so be sure to really understand the lessons.

Barrett Klein is a very unique professor with lots of character. He has a great sense of humor and a hilarious laugh, that alone should keep you engaged. The material is kind of boring, but Klein tries to make it more interesting. I wouldn't say the class was all that difficult, but you pretty much have to show up everyday to get a good grade.

Great guy! Moves quickly, but there are a lot of opportunities to ask for clarification. Very helpful. Held review sessions before each exam as well as the final

Literally craziest and funniest prof I've had. He is very smart and knows what he's talking about. Tests were hard because it's not based on memorization, but more less applying the information to questions. Go to every lecture or it's hard to understand. He was very helpful in class and also holds review sessions before exams, they are challenging

Klein is a really interesting guy! he loves insects and is very nice. He does a good job of explaining the material to you. He loves in class participation. Tests can be a little difficult, and there are some online quizzes

Klein is awesome overall--short description but he is

Dr. Klein is a great professor overall. His tests can be difficult but if you study hard and ask questions you should be fine. He's goofy which makes the lectures easier to pay attention to. He's extremely smart and knows what he is talking about.

Really interesting topic and point of view combining science and art.

Super awesome and interesting guy! Co taught bio 203 with Tom volk. Just a lecture class with few exams but that are the majority of your grade. They do NOT talk about what to expect or study for for the exams so it makes things difficult cus you just kind of have to know everything.

I had Dr. Klein and Dr. Volk together. Dr. Klein is a fun, dorky guy and makes the heavy lecture enjoyable. He usually keeps us update with internships and science news, which can be helpful. His test are hard, and you have to really work for a good grade--although, if you have questions, he is very easy to talk to.

Flexible with projects- makes lectures interesting and loves to help students find applications of course material to everyday life and future careers. Dr. Klein may not be for the faint of heart so if you aren't curious/don't participate you will struggle. Highly recommend his Entomology course!

Really interesting guy! If you need another upper level bio credit and love art I highly recommend this class. Super easy and he's flexible with assignment deadlines. He's always very helpful with any questions as well.

I did the entomology FYS and I really liked it but to do good you need to show interest and talk in class, and make sure to do the quizzes bc they count for so much

Dr. Klein is very passionate about bugs and evolution being a fact, sometimes that took a little bit away from class like in group projects. Other than that, he was good at teaching the material and answered questions thoroughly. Definitely very important to study outside of class to succeed, but overall he was pretty good.

Prof Klein knows the material he is teaching and is very passionate about biology. He does a good job explaining the material and will ask the class if they would like him to change his pace during lectures. There are weekly quizzes that are only a few points and the lowest one is dropped, the exams are a little challenging but nothing terrible.

Barrett is very passionate about what he teaches. He cares about his students and make sure they understand the material. Make sure to ask questions when you are confused and he will clarify very well. Always preview lectures, take extra notes in class, especially if he writes on the board, and review notes after class.

As with any science class, you have to put in a lot of work to get an A. Dr. Klein is a great choice for the class though. He's clearly really passionate about biology and will answer any question you have. He answers emails pretty quickly too and wants his students to do well.

Dr. Klein made the organismal lectures enjoyable and interesting. His sense of humor and interest in biology helped make the class engaging. His tests are difficult, and his office hours were somewhat difficult to attend. However, I would highly recommend taking a class with him, as he truly makes biology fun and interesting.

BK is very clearly passionate about what he does, but that does mean he can talk about it a lot. His lecture was co-taught with professor Kaur, and they could not be more different. Klein is upbeat and keeps students engaged well. The tests were difficult and a lot of very specific knowledge, so be sure to start studying early.

He is such a great guy and super funny, just put in the work for this class and you should be okay. Exams are very detailed things you need to know, so study a lot by going over concepts in lecture slides.

Dr. K is such a funny guy and keeps it engaging. Content is complex, specific, and in great quantity so study study study. Tests are specific. Overall if you keep reviewing throughout the semester you got this. I'd say ask your questions during or after class cuz hours can be few and far between. Just pay attention in class and review.

Dr. Klein cares significantly about anthropology, and during this class, he provided us with great inciteful information that caused me to think more about what he was lecturing about. He also loves questions.

Professor Klein is a very interesting man. Clearly loves his job and profession. Class is not super hard but he is a rather tough grader. Small assignments in class count towards attendance

Barrett is such a passionate and inspiring professor. I had him for organismal which was difficult, but that's a weed-out class. Taking upper-level courses is where he becomes more clear with what is expected of you for tests. Lab practicals are difficult but if you go to lecture and pay attention he tells you what you should know.