He copies the ex problems out of the book and then just puts those on the board for class. He then will mess up the problem and have to go back. He is very hard to understand when he talks. Go to class and do the hmwk and you will do ok.

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Unbelievably horrible. Once you get past his thick Korean accent, you realize that he doesn't explain anything, he skips vital steps because it's "obvious," and he's just plain bad. Worst math teacher I've ever had.

What was the math department at Ferris thinking when they hired this guy? Get ready for a miserable life if you take Hengli. I could easily write a novel on how terrible of a teacher he is. What a waste of my money and my time. Learn English!!! Don't skip steps!!! Ferris State wake up, and fire this guy!!!!!!!!!!!!!

He does stand in front of the chalk board so you cant see. He skips steps all the time and somehow always finds a way to prevent you from getting everything right on a quiz or test. Very difficult to understand. If you need a language class take this one because you will learn to speek korean.

this guy is the worst professor i have ever had. period.

this guy is the north korean terrorist much like kim scott ill...they might be brothers not to mention a column or row is an "ass row" and "**** column" and a corollary is a calorie and he chokes on chalk once in awhile. what a terrible teacher.

He was not helpful, and never took time to make sure we understood the information, he just wrote it up on the board expecting we knew EVERYTHING. Plus he didn't speak very good english so that made it harder to understand.

Don't take him unless you have to. You understand a word he says or for that matter what he writes. If you don't know the material you have to teach yourself. Avoid him at all costs, it's a waste of your money.

Worst teacher I have EVER had in my life! You can't understand a word he says, you can't understand what he writes on the board, he expects you to know everything before you walk into the class and speeds through the information like we are all geniuses. DO NOT TAKE HIM! He is a completely useless teacher!

He was almost impossible to understand and his handwriting is terrible. When people asked questions, he acted like they were stupid and a waste of time. NEVER take him! I am usually a B student in math, and I had to work extra hard to even pass his tests. Trust me, his classes are a waste of money, unless you are already a genius in math.

His accent is hard to get past, but once you do...you realized he does know what he's talking about..he just donesn't know how to teach it! I would not recommend him. He doesnt make sense, he is not willing to help you, and he talks to you like you are stupid. Don't Take Him!

don't take a class with this man. you learn nothing and you can't understand him. it's like he's having a conversation with a colleague. His english is poor and there is nothing to take away from this class.

Absolutely terrible! teacher. I would never recommend taking him. His english is bad, half the time the class can't understand him. And getting out of class at the scheduled time? Happens rarely. He keeps you after and keeps talking. Do NOT take this professor.

This man is so hard to understand. He doesn't explain very well and his online quizzes weekly are AWFUL! His teaching style is weird, if you have no background on Calculus, DO NOT TAKE THIS CLASS! I ended up withdrawing from this course.

Horrible!!!! I got a 33 on my math ACT and you'd think I got a 5 with how little I understood. Terrible accent and HORRIBLE teacher!!!!!!!!! Almost changed my math major so I wouldn't have to take any more classes with this guy!!

STAY AWAY. Barely speaks english, stands directly in front of the notes he is writing on the board, and he is flat out rude to our class saying, "even 3rd graders do better than this." We went over multiple sect. in a single class, he makes everything so much harder than is and you will NEVER use the book so don't bother carrying it around with you

Not a good teacher at all. You can't use a calculator, which is why I did not do well in his class.

HORRIBLE professor. This man understands his subject but just blows right over anything he thinks you should understand already. Notes are useless as he does not explain what he does. Lecture is basically him doing problems with little explanation. Attendance is mandatory but lecture is of little assistance.

I'd rather have my balls bit off by a badger than endure this class again. Yes he has an accent, but that's not what makes him a bad teacher. Care for students:0. Teaching talent:0. Expectations: through the roof.

Horrible class. No calculators allowed. Tests are so difficult and he is hard to understand. Math SLA helped quite a bit though.

auto fail after 3 absences. Attnded every day, went to tutoring, went to his office, did all homework + and studied. got a D. Tests aren't hard just long, 50 minute 3 page tests, 6 page exam. writes problems straight from book no exp. 1 online quiz per night, 3hr min only for first test to meet reqs. after that no feed back on work.

He was the worst professor I have had.

This was the absolute worst class I have ever taken. Tests never lined up with textbook or anything else. He graded tough, and had me in tears numerous time over the course. I don't recommend him to anyone. If you're in the class drop out immediately. Not personable, and often says rude things. He kills your GPA and confidence along with it.

This is the worst class that I have ever taken. I advise no one to ever take this class.

THE WORST class I have ever taken. He hardly speaks English and doesn't allow calculators. He does problems the entire 50 minutes but doesn't actually teach you how to do them.

He is so freaking horrible! He doesn't explain anything and you don't get to use calculators and he give you huge numbers thay take forever. If you want to be taught do not take him

Do not take this class. I read the comments and was like people are just over exaggerating I can handle it. I couldn't. This class was a joke, he never taught he just did problems all lecture expecting us to understand the answers. Test questions are 10 times more difficult then lecture problems too. Avoid him if you want to pass, trust me.

This is the worst professor I have ever had. He does not explain things very well and when he does he second guesses what he's saying. If you don't know exactly what your doing don't bother righting it on the test. He does not give partial credit.

Terrible. I had to drop this class. Talks much too fast, will give one example of an important test problem and will rush through without asking if anyone has questions and will not go into detail unless asked. Assumes you already know everything.

Worst professor I've ever had. I like to think of myself as pretty good at math, but I have never felt more lost in a class. He's very unclear on what he wants to say, and very hard to understand. If you get an answer right on a test, but don't do it the way he wants he takes points off. Absolutely awful, DO NOT TAKE HIM.

Worst math instructor I've ever had. His accent is understandable but he will spend 30 secs explaining the core of the topic at hand and the rest of the time quickly jumping from on problem to another without explanation. I've never felt more lost than I have in this class. Entire class fails a quiz and he shrugs and says study more.

First of all do not listen to the people on here giving him a positive rating as they are probably math geniuses. If you are average or below average at math then you will struggle big time. He goes through problems the entire lecture but does not show you at all how to do them. There are quizzes every week and the exams are quite difficult.

goes very fast through lectures, doesn't go over homework questions or explain things in class, doesn't review for tests in class at all, our class average is a 62% currently at the end of the semester, on tests if you don't have every single thing right on a problem it's all wrong, trust me, do not take a class with him

Worst teacher possible at Ferris don't take his class his accident is very hard to understand. He's goes to fast and could care less if his students pass his class

Heavy accent, harsh grader.

Worst Professor I have ever had. Difficult to understand, course material was tough.

This class was difficult for me and hard to understand. To pass you'll be doing homework for this class almost every night and there's quizzes in class all the time. DON'T MISS CLASS!!

very very tough grader, doesn't make sense at all

There are only four test given throughout the entire course (including the final). There will be lots of homework to complete online which take hours to complete. However, the homework doesn't correlate with what is being taught in class. Be aware that your answers to questions on test must be PERFECT if you want all the credit.

I'm not someone who has issues if I study, but this course seemed impossible to do well in. He flies through material and he won't go over it again. He might know what he's talking about, but he doesn't know how to teach it. He makes mistakes and when you make the same ones, he grades them harshly. If you can avoid it, do NOT take a class whit him.

Professor Jaio is really hard to understand when it comes to how he teaches his class. he also will not stop and go into depth on how he got certain answers and just expects you to come with the knowledge of the subject he is teaching.