Hard, sometimes hand-wavy, but VERY nice and helpful.

He goes quickly, but is incredibly clear and thorough.

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He'll challenge you for sure, HARD tests

I enjoyed

Not bad

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He was my substitute teacher for a while. He's better than my original prof. He's nice and able to help. I love his style of teaching... but don't know difficulty of exams/ tests. Cannot give comments at this point.

very good

very good, very clear, the best for this type of course. those who are complaining are not diligent enough and might lack math skills. his tests cover exactly the material from his lectures, and the proofs follow the very basic rules

He is a great prof. To be honest he is 1 of the best ones i've had at York. The material for his tests & quizzes is coevred in the exercises he gives. He is always glad to help if u don't understand something. do not blame him for ur own incapability.

He's definitely one of the better profs teaching the first and second year Logic for Com Sci classes (whose content ends up being very useless if you choose to go in an AI direction, which actually uses Predicate Logic).

This guys awesome, enthusiastic.. about math.

He was aware of where students usually struggle in the material, and tried to be more clear on those sections. His tests were very similar to previous years, which makes for easier studying. He can also be entertaining at times, although I don't know if it's intentional. Very enthusiastic about his subjects.

very passionate about math

His lectures are very entertaining when he starts waving his arms around his head. He knows the material and emphasizes areas where students will often struggle. If you pay attention you will learn from him. Tests and exam were quite easy, with no surprises. He does practically run out from class every day, but helpful if you can catch him! :)

took his Discrete Math and then Statistics. he is ready to explain stuff on lecture and during office hours, but watch out when he starts joking on lecture - the switch from lecture to joke and back is very smooth, u may miss the idea that punch line of the joke refers 100% to the lecture subject... so listen to jokes as part of material.

Very passionate about what he teaches, and makes you really want to understand whats going on with the material. One of the best Math profs (as long as you work hard in class).

One of the Best Math professors at York University. Totally changed my way of looking at math in general. Not an easy professor because of the he wants the concepts to be understood on a deeper level than just being able to do the exercises, but this is also why he's so good :)

Awesome!

Great Professor. Takes problems and breaths life into them. There is a reason for doing this. A very challenging course to teach and does a great job of it. Is more than fair with quizzes, and very willing to help you work through problems, just ask! Finally someone who doesn't put me to sleep.

Very nice professor. Can be very hard to listen to as he talk very slowly and can be repetitive at times. Other than that you can rely on him for any help you need. However, you must go to him for the help

He is the guy who shows you what is real teaching in math, very passionate, very clear, challenging your assumptions and brains all the time in class. Too much hard homework is the only problem, but that is how you learn.

Difficult test requires proficiency and understanding. He comes prepared but still sometimes confused people. Easily tell that he is not specialized in prob and 2030 is not a easy course though.

Really a decent professor. He makes mistakes occasionally, but so does everyone else. First test was slightly too long and 2nd test was way too easy. He has a casual yet productive course environment.

Compare to other department, math profs are awesome.

This course was definitely not an easy course. This course requires a lot of hard work especially when having Professor Brettler as a prof. However, he is a fantastic professor, he makes you realize the value of math. Just a tip, sharpen your skills on mental math as he does not permit calculators. IT is not impossible to achieve an A in the course

I had very low math skills going into the class, the course moved quickly but Prof made it very easy to understand conceptually. I probably would have failed with another prof.

Prof Brettler explained things very well. Focused on concepts and understanding over precision. very busy course, I had low skills going in and probably would have failed with another Prof

Amazing and best for people who like to understand what they do instead of putting numbers in equations like robots. He is very strong on explaining concepts and ideas, and his tests focus on everything he actually does in class! Love this guy!

A good guy!

I wish I could have him as my prof for every math course I take. He's very theatrical when he lectures and makes it easy to stay focused. He grades based on your ability to understand concepts rather than your ability to memorize proofs. The class isn't easy but he is very fair in his tests and marking

Probably one of the best professors to teach Math. He gives example questions before tests which are very simple to the actual test itself. No midterm but four tests are given. If you practice the questions he gives as well as come to lecture there's no way you would not at least receive a B.

No math background? No problem! This course is more of a logical course more than math. If you can prove an argument you'll do well in this course as being able to give a proof is a fundamental skill. Attend his lectures and do the example questions and you should be fine in this class. Not too difficult compared to most math courses.

He is one of the best prof at YorkU. This course needs some effort to pass for sure, prof gives example questions in every upcoming test, and his lectures are helpful and fun to listen. Overall, he is a good prof and likes to make everything clear to his students. Well organized.