She is very unwilling to work with and help students. Her lectures are hard to follow, mostly because of her accent and she talks very fast. Not very well organized for lectures, almost more confusing to try to follow her.

very unwilling to help the students

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She's an awful teacher and I hate her attitude.

She doesn't even try to be nice, and get's mad when you don't understand and ask questions.

OMG! we even made a petition to remove her! CLARITY is not in her vocab. lets just say i got the highest grade in the class, and worked my butt off for a 3.5. Not nice, dont argue, if you dont want her to yell at you. majoring in chem? take Bishop. tests are long and not covered with stydy guides.

OMG-This lady is a GOGGLE NAZI in the lab....watch out...even if you are mixing water with water it's "safety goggles everyone" and the goggles make it harder to see and are therefore more dangerous than that oh so dangerous water... Take Bishop if you can (not much better, but the chem dept. here sucks...)

Do NOT take this class! If you want to be continually confused and frustrated, then this is the class for you. Otherwise, steer clear. No amount of class attendance or study time will prepare you for her outrageously long exams and the one time she actually provided an answer key to the study guide, it was full of errors. 4.0 students, beware!

Who gave this person a teaching license? She has no desire for her students to LEARN, instead she purposely confuses you and tricks you on tests (she outright told us she tries to trick you on tests). No relevancy what-so-ever to careers of students. When asked "why" questions, she tells you to "just memorize it." Find another teacher, if you can!

Very difficult to understand. Teaches using lecture while writing on overhead transparency. Condescending and not helpful in the lab. Inconsistent, unfair grading. While you may not understand in class, reading the book and doing the homework can teach you enough to do decently on exams. I would NOT recommend this class.

OMG! Avoid taking her class if possible. She is constantly late to class, she runs over at least 5 minutes every lecture. Gets mad and calls you out in front of the class if u ask ?s. Has everyone scared to ask her anything. Her instructions are unclear, her grading technique is extreme she is very hard to understand, really strong accent.

If I hadn't taken chem RECENTLY and with a good teacher before I would have been sunk. Can't understand a word she says, she can't explain anything, treats you like you're in pre school ("separating" students, taking attendance etc.). Be prepared to teach yourself everything you need to pass, she won't be a help.

I loved chemistry till I took it with her. I left every class even more confused than before she "taught" us. Difficult tests, doesn't really care if students do well, if you go in for extra help she asks why you weren't paying attention in class, and 30 pg study guides that will make you want to cry.

So this is to clerify if you go through and read all of these. As you would have guessed by now pretty much everyone hates her, even the smart people. She gives out anout 15 points extra credit a quarter which is nothing. She doesn't care if you pass and gets pissed if you dont get it the first time. She is a bad teacher and lowers everyones GPA.

I had an interest in chem before I took this class and I still do, but she is a terrible teacher. She takes points off your grade for doing what she tells you to do and lies to the students. Not sure if others experienced that or not but I have. Take a different teacher. I only have bad things to say about her.

Confusing lectures (with mandatory attendance), incomprehensible study guides, vague requirements for everything. If you can take from another teacher, DO IT.

Worst instructor ever. She doesn't care about her students. She tells you that you will fail the third test so you better do good on the first two because she drops the worst grade. . He speaks very fast is hard to read her hand writing or understand her if you ask questions she yells at you to listen. And doesn't answer question.

This teacher treats everyone like a 2 year old even if you know what you are doing. I finished my labs in 10 minutes but she still makes you sit for 3.5 hours doing nothing. She is very confusing. She tries to teach everyone "her way" of chemistry without even teaching actual chemistry.

The worst professor I have ever had the displeasure of learning. The character and effectiveness of the professor in question is what I call in to question. Petridou is rude and her directions for her labs are hazy at best. I love chemistry and I intend on furthering my education in this field WITH OTHER PROFESSORS. Take Ochem thru someone whocares

Woah, worst teacher I have ever had. Had her own method for EVERYTHING. If one tiny piece was wrong on a question the whole thing will be marked wrong. Also if you use a normal method to solve a problem it was also marked wrong. Never ever taking her class again. Thick accent as well and unable to give direction or answer questions clearly.

Terrible teacher. She has a thick Greek accent and can't answer questions or give direction. She has her own method for everything and even if you get the right answer with a different method it I wrong. She really likes her red pen. Ugh I have never disliked a teacher so much.

She is honestly the absolute worst teacher I have ever had. Illegible hand writing an accent that is impossible to understand and absolutely ZERO desire to do anything but the bare minimum. Convoluted instructions, and useless exam preps. Impossible tests not covered in lecture at all. I'm a 4.0 student, and was happy for the 2.1 I got. AVOID HER!

Makes up her own system and regardless of correct answer will count as wrong for failing to use her made up system. Will also mark incorrect for arbitrary reasons two people with identical papers received different grades .

Can not understand her. Gose way to fast and tests are nothing like what you had learned.

Worst instructor I have ever had. Rude, rushes you, and expects you to do it "her way" or else you fail- no partial credit on tests. Makes it impossible to get help outside of class other than with her but she gets easily frustrated with students who don't understand. If you want to teach yourself, this would be the class for you.

Impossible to understand. Difficult to read hand writing. Strange grader. A girl left 2 pages blank on a test and I lost more points on those 2 pages than she did. She bases your final grade off of what she thinks of you, so suck up.

I really like Joanna as a person. I think that she has genuine care for teaching and her students. However, in my opinion she is not a good teacher. 65% of the overall class grade was tests, but the tests she writes are filled with errors and rarely coherent. There were only 9 students in my class and we are all in danger of failing the course.

This was the absolute worse class I have ever taken. Do not take her class! She is unclear with instructions, she is rude and condescending. Her instructions make no sense. 4.0 students are lucky to pass this class. The homework assignments took upwards of 15 hours to complete, and there were at least two per week. Worst teacher ever.

She strikes me as someone who either never enjoyed teaching, or became burnt out long ago. Worst teacher I've had at the Falls by far. Impatient, condescending, makes the course much harder than necessary. Arbitrarily marks wrong answers on tests. Take chemistry from L. Jaye Hopkins at SCC, her youtube videos are what saved me during this course.

I highly HIGHLY DO NOT RECOMMEND HER! In Chem 161, she does not give out any homework. It might sound nice, but you would not know what really is going to be on the exam. Also her lecture is very disorganized and she just reads off from the textbook (which is really BAD). As a student and respectfully writing this comment, I do not recommend her.

I would NOT recommend her whatsoever. Her style of "teaching" is very bland, confusing and one sided. Our lectures are composed of her solving the problems and us copying them on our own paper. There is little explanation as to why or time for questions. For labs , we are literally graded on "how well we can copy the board". Petty grader also.

She doesn't explain well in lectures. Just does problems and you copy them. Reads from the book. None of this helps me. I didn't understand anything throughout the whole quarter. You aren't given any material to prepare for exams. You never know what to expect on them. Her grading on the exams isn't helpful, it's just giant "X"s and "NO"s.

In her class she gets off topic alot and makes you copy notes you will never use vs. getting to the important stuff and focusing on that. Also, she has you copy down everything vs. letting you try out problems your self to see if you can learn them. A

This is my third quarter with Joanna so I have learned quite a bunch about her. She is tough. This is not an easy class. You have to study hard and learn the material down pat, if not, you will most likely fail. Almost all of my classmate have said this was the hardest class they have ever taken. It's a good class but be ready to work extremly hard

She doesn't give every1 an equal opportunity 2 succeed. If u miss a class b/c u are sick she will not fill u in on what u missed unless u ask. Even then, she becomes sour & annoyed if u miss a class and takes it personal. She talks over u when u ask Q's, she doesn't explain concepts, vry heavy accent & goes thru things very quick. Absolutely Awful

She expects you to memorize every thing she assigns you to read in the text book. She makes the tests so hard that she gets a tutor, just so you can barely pass. She expects you to go to tutor and takes it personally if you dont have time to go. She also grades on a messed up curve.

I cannot stand her teach style. She does not give you a very good understanding of what to study just study what she has written down. Ok, so is that supposed to help me when it comes to the test. I feel frustrated about this class and I know I'm going fail which makes me upset for nursing school. Even my study group doesnt even know what to study.

If youre wanting to actually learn chemistry, and pass, I dont recommend!! She is completely opposite of helpful, and is extremely lazy and rude. She does not care to help her students

Unfortunately, this professor is not very understanding and does not give students second chances despite good efforts. Extremely hard grader and is unfair to students. Average grade on exams for the class is below 60%. Do not take this class if you want to fail.

Absolutely terrible. Does NOT care about students whatsoever and is a terrible teacher. Her lectures are messy and hard to read. She does not care if you fail, and you will. Class averages on tests are in the high 60's. She will not let you make it up nor explain what you did wrong. Worst class Ic've ever had.

She is not good at online classes, the lectures are hard to follow (strong accent) and the labs are honestly pointless because you can's see anything, due to poor filming. She forgets what numbers she uses during calculations, or just does simple math wrong during her lectures. She DOES NOT like to be corrected. Worst science proff I have had.

Lectures are unorganized and chaotic. She has a heavy accent making it hard to understand and her notes are often grammatically incorrect. You will be told to look at the book if you ask questions. She gives a "pre test" however does not go over it nor provide an answer key.The material is not difficult but she makes it difficult. No Hw=No feedback

She assigns bassically no homework except for video lectures that she randomly posts on the canvas at the most random times of the week. The canvas is so disorganized. The lectures are so long, like 5 hours of lectures, and they are so disorganized, boring, and not helpful. She has a super strong accent that is really hard to understand.

Only 2 people in my class passed

Very disorganized teacher.I would avoid at ALL costs. She says to buy a book but she only tests to her lectures with no homework or feedback. Its also extremely advanced for an entry level class.Her lecture videos are around 8 hours a week, She will mark you wrong for grammar errors, and her questions are very vague& confusing. SHe also yells a lot

This was the most difficult class I have ever taken. Each week had 10+ hours of online lectures that were hard to understand because of her accent and inability to use the camera to actually show what she was talking about. She wastes time in labs by forgetting things or by lecturing about the same topics covered in the videos online.

Instead of going over the study guide or doing review for the test, she begins the next unit before the test for the previous unit has taken place. She is a tough grader. She tends to yell at students and is not afraid to shame and embarrass students for not understanding the material. This professor has made myself and others cry.

I'm taking this class online. She grades based on if you do it EXACTLY how she does. I've taken lots of chemistry and know how to do basic things but she counts them as wrong for not being “set up the right way” even though I have the right answers. It seems pointless to watch her hour long lectures, which are hard to understand. Isn't very helpful

Joanna is stuck in old ways of teaching. Very disrespectful. Rather explaining work that is wrong so that you understand, you get yelled at. Lectures are from covid (almost 5 years) and extremely unorganized. Even when she writes info on paper, it isn't all grammatically correct. Your ears will get blown out listening to lectures as she yells.

Do not take this class. She is not a good grader, and will not respond with understanding responses when you have a question.