I took her for ENVS 114A (don't know how to add a class on here) and it was an amazing class. She is an enthusiastic lecturer and makes the class engaging. The tests were fair and she gave us everything we needed to succeed on them. She's super approachable and is clearly invested in her students' success.

Took ES15A and B. She overcomplicates simple topics and makes tests unnecessarily hard. Unwelcoming class environment, expect condescending responses to questions. Holzer and TAs tend to blame students for their mistakes and not admit when they're in the wrong. More effort is put into policing attendance than properly grading homework / tests.

Iris is a great professor who wants her students to succeed. I found this class to be relatively simple, at least in comparison to the gen chem series, and she is always available for help outside of lecture. She also drops a lot of class assignments, so as long as you stay relatively caught up with the material and homework you can do well.

Iris was a great professor who truly cares about her students. The class was my first chemistry course, so I was extremely worried, but she was very accommodating in her office hours and offered many resources that helped students succeed in her class. Definitely stay on top of the material as it can be easy to fall behind :)