John Marohn - Cornell University

Professor: John Marohn

Department: TBD

College: Cornell University

Rating # 1

Overview:

• Course: CHEM2090
• Grade Received: A+
• Overall Rating: 1.0
• Course Difficulty: 3.0

• For Credit: Yes
• Textbook Used: Yes
• Would Take Again: No
• Attendance: Mandatory

Comment:

His lectures can be interesting to those of you who already took AP Chem and plan to become a Chemical or Biomedical engineer. Otherwise, they are not at all helpful. He does not teach what is tested on prelims. If you want to get an A in this class then you should really hit up the textbook when prelims come around. His demos are A++ though.

Rating # 2

Overview:

• Course: CHEM2090
• Grade Received: B
• Overall Rating: 3.0
• Course Difficulty: 3.0

• For Credit: Yes
• Textbook Used: No
• Would Take Again: Yes
• Attendance: N/A

Comment:

Very passionate and sort of funny, but lectures aren't very helpful if all you care about is getting the grade and fulfilling your requirement (although there is an attendance grade); instead of teaching the material you'll be tested on, he mostly talks about history, proofs, experiments, etc. I didn't use the textbook at all.

Rating # 3

Overview:

• Course: CHEM2090
• Grade Received: N/A
• Overall Rating: 5.0
• Course Difficulty: 3.0

• For Credit: Yes
• Textbook Used: Yes
• Would Take Again: Yes
• Attendance: Mandatory

Comment:

Enthusiasm teacher! Nice person!!

Rating # 4

Overview:

• Course: CHEM2090
• Grade Received: C+
• Overall Rating: 3.0
• Course Difficulty: 3.0

• For Credit: Yes
• Textbook Used: No
• Would Take Again: No
• Attendance: Mandatory

Comment:

Lectures are useless. Much of what is covered in class is unnecessary. However, random online questions for credit are posted often throughout the lectures so attendance is mandatory to get credit. If you are fine learning on your own by using the textbook/youtube, you will be fine. But having to go to lectures that do not help is annoying.

Rating # 5

Overview:

• Course: CHEM2090
• Grade Received: N/A
• Overall Rating: 1.0
• Course Difficulty: 3.0

• For Credit: Yes
• Textbook Used: Yes
• Would Take Again: No
• Attendance: N/A

Comment:

He's obviously very passionate about chemistry, but he's horrible at teaching it to students. His lectures are not helpful at all. They only confuse students more. The proofs he does are pointless and don't actually convey the material you need to know to do well on the prelims. Would recommend signing up for an AEW, you'll learn way more.

Rating # 6

Overview:

• Course: CHEM2090
• Grade Received: B
• Overall Rating: 1.0
• Course Difficulty: 4.0

• For Credit: Yes
• Textbook Used: Yes
• Would Take Again: No
• Attendance: Not Mandatory

Comment:

It's gen chem. You will not enjoy it unless you have prior experience, and he doesn't make it easier. Just read the textbook do the Sapling and practice exams and hope for the best. Learning proofs is useless unless you're THAT passionate about chem bruh.

Rating # 7

Overview:

• Course: CHEM2090
• Grade Received: A
• Overall Rating: 1.0
• Course Difficulty: 4.0

• For Credit: Yes
• Textbook Used: Yes
• Would Take Again: No
• Attendance: Not Mandatory

Comment:

He's very smart and enthusiastic about chemistry, but he gives his lectures under the assumption that you already understand the material. Instead of explaining any concepts, he just does proofs or works examples without explaining the general principles behind them. I stopped going to lecture and ended up learning everything through the textbook.

Rating # 8

Overview:

• Course: CHEM2090
• Grade Received: N/A
• Overall Rating: 1.0
• Course Difficulty: 5.0

• For Credit: Yes
• Textbook Used: Yes
• Would Take Again: No
• Attendance: Not Mandatory

Comment:

He's actually the worst teacher I've ever had. Showed up to lectures, took notes, and payed close attention to what Marohn was teaching. I ended up doing poorly on Prelim 1. Then, I stopped going to lecture/self-studied the course for the 50 minutes during lecture and ended up above the mean on Prelim 2. If you get him as a professor I am SO sorry.

Rating # 9

Overview:

• Course: CHEM2090
• Grade Received: N/A
• Overall Rating: 1.0
• Course Difficulty: 5.0

• For Credit: Yes
• Textbook Used: No
• Would Take Again: No
• Attendance: Not Mandatory

Comment:

To start, he's a nice guy but a terrible teacher. He teaches new stuff in a too complex manor such that you walk out of lecture learning nothing. He always says he'll assign a "very short" problem set, yet every time he says "very short" it ends up being the longest one we've done thus far, and keeps getting longer. The tests are impossible too.

Rating # 10

Overview:

• Course: CHEM2090
• Grade Received: N/A
• Overall Rating: 1.0
• Course Difficulty: 5.0

• For Credit: Yes
• Textbook Used: No
• Would Take Again: No
• Attendance: Not Mandatory

Comment:

BAD

Rating # 11

Overview:

• Course: CHEM2150
• Grade Received: A-
• Overall Rating: 2.0
• Course Difficulty: 4.0

• For Credit: Yes
• Textbook Used: Yes
• Would Take Again: No
• Attendance: N/A

Comment:

Great person with amazing enthusiasm and dedication. Unfortunately this does not translate into good lectures. If you read ahead of the lectures, you'll find them much more useful, but even then attendance likely won't help you solve many problems.

Rating # 12

Overview:

• Course: CHEM2150
• Grade Received: B+
• Overall Rating: 2.0
• Course Difficulty: 3.0

• For Credit: Yes
• Textbook Used: Yes
• Would Take Again: No
• Attendance: N/A

Comment:

Lectures were the most useless thing. He just derives equations which has nothing to do with the tests and doesn't really help you learn chemistry.

Rating # 13

Overview:

• Course: CHEM2150
• Grade Received: B+
• Overall Rating: 2.0
• Course Difficulty: 3.0

• For Credit: Yes
• Textbook Used: Yes
• Would Take Again: N/A
• Attendance: Not Mandatory

Comment:

Marohn makes concepts cryptic, whether it be in lecture or OHs. Labs are graded too harshly and take too much time. Passing the tests are manageable if you read the text; lectures are not necessary at all--they can confuse you more. I was considered ChemE, but after this class I (and about 75% of the class) changed their minds.

Rating # 14

Overview:

• Course: CHEM2150
• Grade Received: B+
• Overall Rating: 2.0
• Course Difficulty: 4.0

• For Credit: Yes
• Textbook Used: Yes
• Would Take Again: N/A
• Attendance: Not Mandatory

Comment:

Marohn is a great guy and he obviously knows the material well, but he does not do a good job conveying this in lectures. The lectures were very sloppy and confusing, and the expectations for the course were extremely unclear. I pretty much learned the course material through the textbook.

Rating # 15

Overview:

• Course: CHEM2150
• Grade Received: B+
• Overall Rating: 2.5
• Course Difficulty: 4.0

• For Credit: Yes
• Textbook Used: Yes
• Would Take Again: N/A
• Attendance: Not Mandatory

Comment:

Marohn is a very nice, friendly person. His enthusiasm for the subject is astounding. However, that enthusiasm doesn't translate well into lecturing and teaching an intro honors chem course. Spent way too much time deriving formulas in lecture. Lectures are hard to follow. If you want to pass DO THE HOMEWORK and really study it. Go to office hours

Rating # 16

Overview:

• Course: 2150
• Grade Received: N/A
• Overall Rating: 2.5
• Course Difficulty: 4.0

• For Credit: Yes
• Textbook Used: Yes
• Would Take Again: N/A
• Attendance: Not Mandatory

Comment:

Marohn has good intentions, and some of his lectures are interesting. However, he spends far too much lecture time deriving formulas and ideas and nowhere near enough actually discussing the material. As such, to pass the class, I know many people that did not show up to lecture that did better than those that did. Do the homework and study it hard

Rating # 17

Overview:

• Course: CHEM2150
• Grade Received: A-
• Overall Rating: 3.0
• Course Difficulty: 4.0

• For Credit: Yes
• Textbook Used: Yes
• Would Take Again: N/A
• Attendance: N/A

Comment:

Marohn is obviously really interested in what he is teaching. He's very entertaining and fairly approachable. The problem is that he doesn't convey the material very well. His lectures could be very confusing and didn't reflect what appeared on the exams. Almost everything had to be learned from the textbook, which was pretty bad. A+ demos, though.

Rating # 18

Overview:

• Course: CHEM2150
• Grade Received: N/A
• Overall Rating: 3.0
• Course Difficulty: 3.0

• For Credit: Yes
• Textbook Used: Yes
• Would Take Again: N/A
• Attendance: N/A

Comment:

Professor Marohn holds office hours once almost every week but he takes forever and goes out of topic while solving a problem and there are tons of students asking him questions. Labs really are annoying (some of them will be like 8-9 pages). However, tests are curved really generously so if you do +1 SD the mean you will likely get A+ in the cours

Rating # 19

Overview:

• Course: 2150
• Grade Received: N/A
• Overall Rating: 1.5
• Course Difficulty: 5.0

• For Credit: Yes
• Textbook Used: Yes
• Would Take Again: N/A
• Attendance: N/A

Comment:

Although he's enthusiastic about chemistry Prof. Marohn's lectures are completely useless as he unnecessarily derives formulas and lectures about topics that have nothing to do with what we need to know or what will be on the prelim. Everything I "learned" from this class was from the textbook. Overall, this class was a very bad experience.

Rating # 20

Overview:

• Course: CHEM2150
• Grade Received: N/A
• Overall Rating: 4.0
• Course Difficulty: 3.0

• For Credit: Yes
• Textbook Used: Yes
• Would Take Again: Yes
• Attendance: Not Mandatory

Comment:

Did not give enough time to read the textbook pages before assignments were due, even though they were pretty essential to completing the problem sets. Lectured on lots of material which were not covered on prelims or the final. From observation, if you could understand his lectures, you would enjoy them. Otherwise, you would absolutely hate them