Reviews of professor Alex Barrios

Rating: 4.0/5, difficulty: 3.0/5
Very caring, and gives concise explanations during lectures. He's easy to get in touch with outside of class, and even agreed to meet with me to discuss my final the term after I took his class. My only criticism is that his lectures are a little dry/formulaic, but they're straight-forward and easy to follow despite that.

Rating: 4.0/5, difficulty: 3.0/5
Alex is a great lecturer, be sure to pay attention. They can seem a little dry, but he's super passionate about what he teachers.

Rating: 5.0/5, difficulty: 4.0/5
The subject matter isn't easy, and there are a lot of homework problems, but Alex is great. I highly recommend going to his math labs.

Rating: 4.0/5, difficulty: 3.0/5
Alex is great! He explains difficult concepts really clearly, and he's incredibly helpful outside of class if you go to to his office hours. He does go into a tangent about the history of math every so often, but it's often surprisingly interesting so it didn't bother me too much.

Rating: 5.0/5, difficulty: 3.0/5
Professor Barrios is an excellent professor! His method of teaching helps you understand the concept and problems right on spot without having to rely on the textbooks too heavily. Amazing!

Rating: 5.0/5, difficulty: 4.0/5
Alex is a gem and even though Spring Term 2020 was a crash and burn with the COVID situation, he made do to the best he could and made Number Theory really interesting and comprehensible for all of us.

Rating: 2.0/5, difficulty: 4.0/5
The days of class where I learned the most were the days when we were taught by a substitute professor. Alex is extremely smart and good at explaining certain things but other things are somehow impossible to understand even in his office hours, which are really long-winded. I really appreciated his willingness to go over exams with me though.

Rating: 5.0/5, difficulty: 4.0/5
Course material was very challenging but Alex was an awesome and super caring prof. His office hours were very helpful too.

Rating: 4.0/5, difficulty: 3.0/5
Alex was excited about teaching and gave fairly good lectures (although difficult to follow sometimes). However, he took FOREVER to answer questions during office hours. I would go in to his office with two questions from the homework I was stuck on and wouldn't leave for an hour and a half. His tests were fair and straight forward.

Rating: 4.0/5, difficulty: 3.0/5
Alex is helpful during office hours, gives lots of partial credit on test questions, and is the type of prof who will chat with you if he passes you on the sidewalk. He is perhaps a little bit awkward but he's nice, though sometimes he isn't the best at explaining concepts; often students still seem confused after he tries to answer their questions