Yunrong Chai is a Biology professor at Northeastern University rated 3.76/5 by 187 students, with 3.25/5 difficulty and 33.0% who would take them again (TRACE + RateMyProfessors + Reddit, updated July 2026).
Yunrong Chai professor reviews and ratings: 3.76/5 from 187 student reviews at Northeastern (33.0% would take again). TRACE + RateMyProfessor + Reddit.
Pr. Chai is very kind and he's very approachable. His lectures are incredibly boring though. It was hard to stay awake. Exams are easy, half the questions are from homework and his study guides are good representation of whats on the exams. Show up, spend a couple days going over slides before exams and you'll be fine.BIOL3421 2023-05-01 22:48:57 +0000 UTC
Clearly a good teacher, but a tough class at times due to organizational issues. It was his first time teaching capstone so he might get better. Nothings been graded for the past two months so i'm very uncertain about my final grade. Not a lot of feedback. He had us do peer review of each others work but didn't give us the peer review notes.BIOL4701 2023-04-23 19:40:41 +0000 UTC
Dr. Chai mid-semester changed the weight of an assignment he said was worth full points as long as our name was on the paper to something that needed to be right to get all the points for that assignment. I believe this is very unprofessional, he must respect his students work and follow through with what he promised before the assignment was due.BIO3421 2019-10-08 15:24:11 +0000 UTC
Professor Chai is great!! Please take him for Microbiology. He is very knowledgable about his field. Also, the class is very doable if you keep up with his lectures, which are great! His quizzes are literally from the power point slides and he is a very fair grader! Strongly recommend him!!BIOL2321 2018-04-26 19:47:23 +0000 UTC
Professor Chai is one of the nicest teachers I've had and really tries his best to make his class doable for everyone. Potential test questions are posted before the test and he picks a few of them to ask on the actual test so studying guarantees a good grade. He also has very interesting anecdotes about random phenomena in class.BIOL3421 2019-12-31 01:56:53 +0000 UTC
The study guide was very helpful for the Quiz, not as helpful for the midterm. The level of difficulty when comparing the quiz and midterm is exponentially different. Other students were stating he gets his test questions out of the textbook and the free response out of the study guide so keep that in mind.BIOL3421 2019-10-29 22:36:30 +0000 UTC
Yunrong Chai has an average rating of 3.76/5 from 187 student reviews. 33.0% of students said they would take them again.
Yunrong Chai's classes have a difficulty rating of 3.25/5 based on student reviews.
Yunrong Chai has taught BIOL3422, BIOL6405, BIOL3421, BIOL4701, BIOL5569, BIOL2321 at Northeastern.
Data updated July 2026.