Tough teacher, decent explanations. He comes across as arrogant and as if he is too good to teach a 100-level chemistry course. Not recommended.

great prof, easy going, lots of help

DR. Halfen was amazing he taught the content very well and was always willing to help you out. He is a very smart man but he know how to teach to students so they understand the concepts even if they are not interested in the class

Even though the material can be tough, he explains it very well so you can easily do the homework and quizzes. Make sure you do the homework even though it isn't graded cause otherwise you'll do bad on the quizzes and tests. Very nice guy, wants to help you learn. Totally made the class cool.

Dr. Halfen is the best chemistry teacher I have ever had. Prior to taking chemistry with Halfen, I HATED chemisty, mainly because I never understood it. However, Halfen did such an excellent job of teaching the material, I decided to minor in chemistry. I strongly recommend taking Halfen, he's by far one of the best professors at the University!

See comment below, I agree 100%!!!

Prof. Halfen has an excellent teaching stlye. He finds a way to simplify the most complex concepts so that anyone can understand them. plus he's not too hard on the eyes!

Good Class, Great Teacher. Take chem 104 with him!

Great teacher! Very good at explaining things and helping you to learn them. Its a tough class but he is great at teaching it. Take him if you can!

Dr. Halfen is overall a nice guy, but kind of intimidating. He expects you to know a lot. Its a hard class in general, but he does a pretty good job at explaining things. Definitly do the homework because they show up in the tests and quizzes.

He is a very good professor in lecture. But not worth the amount of extra info he expects you to memorize, and his exams are ridiculous. 4 points each for multiple choice! If you like a challenge take him.

Dr. Halfen is very easy to understand. His lectures/notes are written on the board and are very clear. Homework is not checked but if you do the readings and homework problems it really helps a lot. He assigns the problems w/ the answers in the back to check. Tests are fairly easy, just go over the notes and study and you'll do fine. Great teacher

Very inteilligent, good lectures, tests tough but fair. Homework not required, but do it or your grade will suffer.

Halfen is very clear on lecture and the assigned problems are very helpful. but you do have to earn your grade. If you want to slack and get an A then do not take him. If you actually want to learn the material then he is a good prof to take.

Dr. Halfen was such a good prof that I took him for 104 after having him for 103. The tests are easy if you do the homework problems and ask for help. He is intimidating in person but will help on e-mail. Take him for both lecture and lab. His labs usually get out early.

GREAT

Mr. Halfen is a great prof! he is always very clear in his lectures. His tests are pretty difficult..but chemistry in general is difficult no matter who you take it with. He's very passionate about chem and has always been very helpful!

His power points were very helpfull and very clear. He explains things very well. If you attend class, do your homework and read the text book you should be good. The class is challanging but managable. I would deft. take it with Halfen!

Halfen is very clear on the subject. His power points are very helpful and he makes study guides before tests. He didn't make attendance mandatory, however you would struggle more if you didn't. If you do the homework, attend class and read the text book you should be good!

I was scared coming into the class, but it turned out to be fine. Take good notes, DO THE HOMEWORK!!, go into his office hours and ask questions about the homework, b/c more than likely, they will be on the exams. Exams are straight forward, but difficult. Definitely steady hardcore for those and study hard for the final!! Excellent prof.

A very straight-forward professor. Read the chapters before going to lecture and you will definitely get more out of it. Lectures are very helpful for understanding and remembering the material. However, if you have a question make sure it is absolutely necessary to ask him unless you want to feel awkward as he gives you a snappy response :/

Is great.

Prof. Halfen was Awesome. He did an excellent job at explaining the material and he taught straight out of the book which makes it really easy to follow. His Exams are difficult but are also right out of the homework and lectures. DO THE HOMEWORK He doesnt collect or grade it but if you want to do well in this class you NEED to do it all around fun

Definitely a hard prof. The class is well structured, and if you aren't afraid to work hard you'll do fine. Weekly quizzes help keep you on track and focused on the course.

Definitely a hard prof but does his job really well.

is great!

He is very good at what he teaches. I love his class. He is very helpful when you ask for help. If you study hard for this class, you'll get at A for sure.. :D

Halfen is a really good professor. He is very helpful and you can really learn chemistry from him. Chemistry is pretty handful to take in and Halfen really helps you with that. I highly recommend taking chemistry with him. You won't regret it.

Okay professor. His tests are super hard, make sure you do the reading and go to all the lectures. (And remember the D2L quizzes) He's not good with make-up work so DO NOT miss labs. Also doesn't reply to e-mails, which is extremely frustrating. Other than that, really smart prof, knows what he's talking about.

I really struggled in Chem 103 with a different professor, but Chem 104 has been pretty easy so far. He makes 8 am lecture worth it, and explains everything so clearly. He goes above and beyond to make sure all students have adequate resources to succeed.

He is an awesome professor that works really hard to make sure his students understand the basics of chemistry. Just expect to study a lot because there is a lot of studying involved, but if your willing to put in the time, you will do awesome.

He is a great guy i talked to him everyday before class and he is really there to help you if you need it. His lectures are very informational but you really learn a lot form them

This class is by no means easy but if you show up to lecture and take good notes to study from the tests are not that hard. He posts the lecture notes which are very helpful because he can go through some things quickly and it's nice to have the practice problems we do in class already written out. He's a funny professor and you get to see that.

Dr. Halfen is willing to help if you ask him questions (especially in lab) - the more specific the question, or interest you show in working to find the answer instead of him just giving it to you, the more help you'll get. Go to as many lectures as possible, he covers a lot and it's hard to catch up. If you work hard, you'll get a good grade.

Dr. Halfen was INCREDIBLE!!! He was a much better teacher than any high school teacher I've had. His tests can be tough sometimes, but a good way to study is to practice the online homework before the tests-I would HIGHLY recommend him

Honestly one of my favorites!

He is seriously the nicest and most helpful professor I have had, I understood everything and was actually convinced to change to a Chemistry major!

Professor Halfen is a wonderful professo, I wish more science professors were like him. Chem is a hard class for a lot of people but he is very clear. He really knows how to teach an intro class. It is not an easy class by any means, but as long as you read and do the online homework and a little more, you will do fine in the class.

As someone who didn't take chemistry in high school, this class was really difficult. He expects a lot of memorization in a short amount of time. Lab was challenging, because you teach yourself, take a test and then do the lab. He is very clear and engaging during lectures and if you take good notes and study hard, the tests are doable.

As someone who started this class expecting to fail, I truly appreciate Professor Halfen. He is extremely understanding of a variety of different situations and is available to help when needed. Not a big fan of chemistry but enjoyed him as a professor. Also he has fishing youtube videos.

My roommate recommended Halfen to me and I am so glad I took the class. It's probably one of the easier classes that I have taken in college. Homework is really manageable. Some people struggle with tests, but don't let that scare you. They are fairly simple and really exactly what he goes over in class. 100% would recommend.

Basic chemistry course, chemistry is hard course so you should expect that. But would highly recommend Halfen over others. He is great with grading and lab you are not required to hand anything in for points.

Lectures are long and boring. Chem is hard, but the assignments are easy point and help out the grade. The class is curved also.

I thought he did a nice job. He advised us to sign up for a tutor on the first day of class, I wisely took this advice and also attended the student SI sessions and both of those together were extremely helpful for me learning the information and doing well in the class.

He is a good teacher and very excited to teach. He is a loud talker but it is probably because the lecture hall is so big so he needs to be heard by everyone. I would highly recommend printing off his notes before hand (it'll make your life easier). Labs are fun. Study for your tests days in advance and you'll be good!

Halfen is the best! I recommend taking him for beginning chemistry classes, both the lecture and lab sections. He is always willing to answer questions and his lectures are clear and organized. He does not test on anything that he did not lecture on.

Dr. Halfen is by far the best professor I've had. His lectures are easy to follow and he explains everything in simpler terms. The homework and weekly quizzes get a little long but they help a lot in applying lecture material. If you do your best and show that you want to succeed, he extremely helpful and encouraging when you ask him questions.

Halfen is a very good chem lab professor. He explains everything perfectly, but if you forget your chem goggles you better be ready to hike back up the hill to get them! I would definitely choose him as a professor if you have the chance!

I took chemistry in high school and hated it, but found chem 103 to be quite easy, especially with Dr. Halfen teaching it. Homework every week but it helps you prepare for the exams. I highly suggest attending the SI sessions as well for extra practice. Put in the work and effort and it's a pretty easy A. Also, Lab is easy I always got done early

He was very accessible outside of class and helped me a lot when I didnt understand a concept. There are weekly homework assignments, but they help you keep up with the coursework.

I thought he was a very good professor, this is tough content, but he helps a lot with his presentations and follow-along notes. The Cengage homework and weekly quizzes really help you learn. You must study to pass his tests, but if you know the content you will be fine!

Such a nice guy! Sometimes he can talk kind of loud which is a lot to handle if you have him in the morning, but otherwise our grade is based off of 3 worksheets - pre lab, in lab, and post lab. Attendance is mandatory and if you skip it you'll be screwed. I really liked this class and the labs were fun

Chem lab with him was very easy and simple. If you ever had a question he always answered it and helped. Ever since COVID he started posting on line versions of labs so it isn't too bad to miss one lab day. He also goes over all math before or during the lab so you understand it.

Prof. Halfen's Chem 106 Lab is amazing. He does a great job at explaining how to do the lab beforehand and for a majority of the labs he explains the math sections of the labs as well. He is a really fun professor and is very understanding.

He gives very thorough review/ lessons/ lab instructions. Very knowledgeable and willing to help. If you finish your lab early you can leave. You are graded on your lab (with a rubric or specifically states what's required. You take pre/ post lab quizzes. I recommend taking both quizzes after the lab because the lab and quizzes are due on Sunday.

I really like Professor Halfen and love his lectures. This class is tough cause it covers sooo much information, but if you study hard you can pass; 88% is still an A and 76% is a B. I do wish he offered extra credit and that the homework would be graded faster. He has very helpful study guides though and will meet with you to review tests

Professor Halfen was a great teacher! The class was hard but if you put in the effort you could definitely get a good grade. The textbook is needed, and all homework assignments are from there. His lectures were off PowerPoint but he did a good job at explaining the subject matter and didn't just read the slides. Overall, it is a good class!

Prof Halfen is extremely knowledgeable and knows what he is talking about, but that is one of the reasons he was difficult to learn from. It was hard for him to dumb things down. All the homework is done out of the textbook but is basically graded on completion. The tests were hard but doable.

I really enjoyed my Chem Lecture with Dr. Halfen. It was a pretty tough course for me personally, but after I found some outside-of-class supplemental instruction I started to really enjoy the course. He is also very funny! If you have him do not skip lectures! And take advantage of his notes.

Very knowledgeable about the subject and is open to questions throughout his lectures. Will always reexplain if asked to. Has an assignment and a quiz due every Monday (annoying but honestly makes the tests so easy). Only 3 exams in total each with an online portion and an in class portion each (online worth more points than in class).

Jason was a great professor. He would preform experiments in lecture and was nice. At times his lectures got long yet, a lot of his stuff is online, including exams/final.

Kind, sometimes would cancel Friday classes and have an online lecture, which was nice. Recommend. Not a lot of homework.

I had Halfen for intro chem and didn't like him. To my surprise, he was amazing at teaching higher-level chem! He was thrown into teaching ochem last minute and won't be teaching it again but I wish he was. Lectures were engaging, explained everything well, and gave a list of textbooks problems to work on outside of class that helped with exams.

Great professor and did not try to trick you on exams. Exams were exactly what you had seen in class and on practice problems.

Funny Hockey player and relatable. Knows what he's doing and has fun doing it.

great professor, it's obvious he knows his stuff and has taught this subject for a while. be careful of sitting in the front row - he will rub a balloon on your hair for static electricity demonstrations.

Make sure to go to labs as you don't want to miss them. Dr. Halfen was a very good teacher and he's good at explaining things.

Prof Halfen is very knowledgeable, but his lectures can be hard to follow for an intro class. The workload is heavy, with weekly assignments and quizzes. Thankfully, Unstuck ai was a lifesaver for test prep and helped me stay on top of the material.

He is very knowledgeable and answers any questions I have. It is clear he knows what he's doing.

I had him for CHEM 105 and CHEM 109 Amazing professor, very caring and knows his stuff, super chill grader, and half of the exams are online. Super fun lab professor as well.

Dr Halfen was great for chem 105! He's a great lecturer and you can tell how organized he is and the thought he puts into class. He is definitely one of the tougher chem 105 professors, but he is great at teaching. If you stay on top the homework and do the extra practice problems you will be fine. I would definitely recommend taking him.