Does not speak English. Gets mad if you ask for an explanation. Worthless Prof.

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horrible and difficult, after mid term I had to drop out.

horrible, should be sent home.

just...awful is the only word to describe it. somehow i miraculously pulled off a C.

he is the worst teacher ever, can't understand him, tests are not on anything you cover in class, doesn't understand you, and explains what an equal sign is

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what on earth is this guy talking about. I think I am more dumber for taking his coarse

very hard to understand, too smart to teach the course

Very hard. Thinks that people learned how to do derivatives in middle school, cuz apparently that's when he did. DO NOT TAKE HIM. Horrible teacher can't explain material

Horrible teacher. Can't explain the materials.

can't speak english clearly, not helpful, doesn't teach, and thinks that calc one is supposed tobe taught at a grad student level. avoid at all costs

Goes too fast. Doesn't speak english. Just overall sucks.

Calculus is hard enough as it is - Xinfu Chen was just not a good teacher, I believe he knows what hes talking about but just can't convey information

It would help if he could speak english...I stopped going to class out of frustration of not being able to understand what he was saying. Nothing helps unless you have a good TA

THE WORST PROFESSOR EVER! Xinfu Chen absolutely sucks! If you get him for calc, make sure you transfer to a different class! He can BARELY speak English, making it very hard for us to try to ask him questions. In order to pass the class, you need previous knowledge of calc.

Chen absolutely sucks! I had to withdraw from calc b/c I was unsure if I would even be able to pass. I also decided to change my major b/c of calc. He isn't clear on the material at all and he expects you to know a lot of calc and physics already. Just don't take him for calc and you'll be OK.

Chen was a terrible professor. I lived at the Math Assistance Center most of the semester because he did not explain anything in class. He had examples but they were for the easiest problems in the book- uneffective for tests or homework. He didn't at all when you asked questions. Run away!!!

Xinfu means well but clearly cannot teach effectively... hard to understand and can't answer questions. Take another professor if you can. The calc I lab is such a waste but that's not Xinfu's doing.

I learned more in 1 class with a substitue teacher than with an entire semester with him, not even lying. - I agree with the other comment... RUN AWAY!!!!

GET OUT if you can. If not, dont panic. Get his review sheets and get help from the TA's on those problems. They are similar to the ones on the test. If you plan to take calc 2 and/or havent had calc before, Id drop him and take someone else next semester because you probably wont learn anything in his calc 1. Check out Athanas.

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RUN. His class is horrible and I had to learn through the book. Worst teacher I have ever had.

This man made my life a living hell last year! Avoid taking his class at all costs!! The only bright side is he says some hillarious things, only because he can't speak English.

Look people...Im the type of guy who never blames anyone else. If I don't get the results I want then I must not be working hard enough. But Xinfu is terrible at teaching. I couldn't understand a word he said. I don't think he understood what students asked. I'm positive he is a great mathematician. Not a good teacher! Assumes you know it already

very hard to understand, both midterms very easy, DOES NOT prepare you for the final in any way. class is almost useless to attend.

he is funny guy, but he is one of the worst teachers I have ever had. He does not prepare you for the final and his class is boring and it not even worth it to attend.

I was amused in class, but not when it came time for the test. Xinfu is clearly smart but also clearly doesn't care about his students. He makes a lot of errors during class and has to go back and fix them, and while it's funny to watch, I didn't feel like I learned anything or was prepared for the test.

Worst Teacher I Have ever had at pitt. Screamed at us for an entire class. No organization, makes tons of mistakes, and if you ask a question be prepared to be told "how can you not understand this". Not recommended at all

Chen is the worst Math teacher at Pitt. He makes mistakes way to often when problems are already in final stages of solving. No answer keys for review exams. The class is fairly easy but his bad teaching makes it harder.

Chen is one of the worst professors I have taken at Pitt. He is completely unaccessible and unorganized, do not bother emailing him with any questions. Your grade is based solely on exams so come prepared. I do not recommend.

Xinfu never seemed like he had any idea what he was doing. Instead of explaining the concepts, he would just yell at you. He also assumed we knew a lot more math than we did and stuff he said just went over our heads. He also assigned massive amounts of homework. Fortunately, his exams were easy, so if you are able to teach yourself you'll do okay.

Xinfu was interesting, to say the least. My man showed up to class every day looking fresh, but his teaching left a lot to be desired. He shouts half of the lecture and whispers the other half, assigns an excessive amount of homework for the material, and generally doesn't prepare his students. I want to like him but he just makes it so hard.

Worst professor I've ever had at Pitt. Very tough grader. I've had grad students say I should have gotten more credit on problems he graded. He yelled at one girl in class because she got the right answer, but he marked the whole problem wrong for not labeling it correctly. 30-50 written problms/week. Grades policy makes no sense. DO NOT TAKE HIM!

Save yourself the trouble, don't take this guy.

He is very hard to understand when lecturing, and he is not a fair grader. He does not like to be wrong. He is also not very accessible out of class, as he told us directly he never checks his email. Unless you are an absolute calculus genius, I would not recommend taking him for Calc 1.

Awful. Does not answer any emails and rarely attends his own office hours. Does not like to be wrong and grades very harshly. Lectures are boring and have nothing to do with the material tested. Was not prepared AT ALL for department final. Had a B until the final. I ended up having to retake the class.

If it's your first time taking calculus 1 DO NOT take this class. After maybe 2 lectures I realized that it would be more effective to teach myself. I had taken calc in highschool so I managed with youtube refreshers. If you want to teach yourself, go for it; he doesn't require attendance. If you need guidance/haven't taken b/4, don't take Xinfu.

His lectures were disorganized and made no sense partly because he was YELLING almost the whole time. His homeworks were unnecessarily long and I don't think he even looked at what the problems were before assigning them because many weeks we'd have the same homework numbers but in a different section. I just skipped lectures and read textbook

Chen seems like a nice guy but DONT take his class. he doesnt check his emails at all and the lectures barely help with understanding. I only went 50% of the time. the textbook is better than lecture but it sucks too, so good luck reading that. lots of homework as well, graders are slow and inaccurate. take someone else for diff eqs.

I somehow got a good grade in this class. I taught myself everything I knew from the book. Never take Xinfu, there is no chance you will understand because his lectures are all over the place and impossible to follow. The only way you'll learn is if you do practice problems and teach yourself.

Xinfu Chen is essentially a homeless man that Pitt hired off the street.

Awful lecturer, always late to office hours. Language barrier, impossible to reach outside of class (does not answer emails, work phone or canvas messages). Be prepared to completely self teach yourself the course using the textbook and its solutions. While midterms are easy, he does not prepare you for the final at all.

Avoid avoid avoid. Chen does not respond to emails, provide a syllabus, or even update anything on Canvas at all. His lectures are okay if you don't mind some yelling and smell of tobacco, but you would be better off just reading the textbook. The class is easy since his midterms are almost identical to the practice problems he worked through.

Never take this if you want to learn the content. He has taken three full months to grade both our midterms. Doesnt check his emails anymore. Significant language barrier which causes misinterpretation from his side. Very disorganized. Exams are almost identical to problems he reviews near every midterm. Please look for someone else to teach you.

Dr. Chen is the most disorganized and unprofessional professor I have ever had in college. He does not have a syllabus or check his emails, did not grade our first two midterms until the end of the semester, and us that over 200 "XtraProblems" were mandatory the whole time on the second to last class. Still no grade posted. Worst professor at Pitt.

By far the worst professor I've ever had. He hardly speaks English and isn't able to understand basic questions. He doesn't answer emails and told us at the beginning of the semester to not even try to contact him. He added about 100 problems of homework in the last week. He also submitted our final grades two weeks after the deadline. Just awful.

Hilarious because he has no idea what he's doing. Doesn't speak English. Nobody learned anything. Got our midterms back right before finals. Second to last class assigned 200 mandatory problems. Final grades submitted a week late. Everyone completely failed the final. Can't tell you anything I learned from the class. Class was a total fever dream

Dr. Chen is the worst professor I had while at Pitt. He was impossible to reach outside of class. His lectures were all over the place, and he posted absolutely nothing to Canvas. Midterms were easy, as they were very similar to his review problems, but everyone failed the departmental final exam. Please take literally anyone else.

Chen is the worst professor I will ever take. Wore the same clothes to every lecture, cannot speak english well, and only screams. Have questions after class? Ur cooked. If you manage to catch him outside of class, don't expect it again. Never in office hours, told us he wouldn't respond to email, and gave us his personal number. Hilarious tho

AVOID AT ALL COSTS!! By far the worst professor I've had at Pitt. Didn't receive a single grade until near the end of the semester. Class doesn't prepare you for the final whatsoever. Midterms weren't too hard but expect to learn everything through the textbook. Lectures were a joke. Wore the same pair of pants all semester, yells during lectures.

DOES NOT USE ONLINE RESOURCES. Didn't grade anything until last two weeks, including exams. Took second exam day we got back from Thanksgiving break, then told everyone that some had been using the wrong textbook. Refuses to review Lin Alg since it's a pre-req (nope). Gives homework based on textbook, not class. FELL ASLEEP HALF HOUR INTO FINAL.

DO NOT TAKE DO NOT TAKE DO NOT TAKE DO NOT TAKE I DON'T CARE IF HE IS YOUR ONLY OPTION DO NOT TAKE THIS PROF. he's the worst prof I'll ever have by such a wide margain. He assigned a midterm the DAY AFTER thanksgiving break, and two LARGE problem sets TWO DAYS LATER you will learn nothing in class, and he provides nothing. DO NOT TAKE. DO NOT TAKE