Average 3.22 based on 43 teacher ratings
David Kosier is a Math teacher at Guilderland High School located in Guilderland Center, New York and part of Guilderland Central School District. David Kosier's 43 teacher ratings contributes to Guilderland High School's ranking of 1,211 in New York. Additionally, the average teacher rating at Guilderland High School is 4.18 stars.
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Recommended
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I currently have Mr. Kosier as my 9th grade Algebra teacher. I've always been decent at Math, never failed nor did I excel at Math. Kosier doesn't really 'teach', he will give you a packet and walk you through it. But even a packet doesn't cover everything, you will still get stuck on some questions. If you're a B-C student at math, you'll have trouble with Kosier unless you really push yourself to do better. I do not recommend Kosier, try to switch teachers in the beginning of the year.

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Make friends in other classes who understand what they are doing and if you can switch out in the beginning of the year, then do it. If you understand the material it will be an easy class.

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how dare you all fail dave. he's my best friend and an AMAZING human being and person. he's sinsitive kind caring and beautiful in every which way. i<3dave.

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So he might not be the best at teaching but I think he's a great person. no joke. I really like him as a person and he's easy to talk to. Just wish he taught better is all.

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Mr. K is like the best guy around, such a good guy, been threw a lot. His teaching might not work for most. but...heavy emphasis on the good guy..

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Mr. Kosier is the best teacher ever but unforunatly he cant teach to save his life. Half of my class has below a 30% and none of them care whats going on.Needs 2 go back 2college, learn how to teach!

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Very Nice Guy just doesn't no how to teach if his life depended on it

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Kosier is one of the coolest guys ever! Maybe you all wouldn't complain so much if you did your homework and payed attention in class. He's an amazing xc coach as well. Mr. Kosier rocks!

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just be nice to him, and he'll be nice back. if u actualy try, and do the work, and go to him in advisory, you will be fine. hes nice once your on his good side! PS tryyy and laugh at his jokes

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I havent had him as a teacher only a coach but he is a really cool guy. even tho we hate most of his workouts at xc he is really nice

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Worst math teacher he does not teach is just thinks we should know it. He should just leave.

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He is an okay teacher, but if you do your homework you will do well in the class. Coaching is his real gift, he's a great xc coach.

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Kosier is so funny! Idk how he is at teaching, but he's really nice and would be more than happy to give u extra help!

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seems like a great guy, but notes are basically non-existent, and most of the block consists of kids staring blankly at the board and him saying "easy, right?".

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he's cool.. but in general he's not a good teacher..he doesn't really explain things, he just expects you to know them

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He is a great teacher! Too many of you just don't know him well enough. If you think he gives too much homework, think about how much homework you would get if you took 10-X.

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He is really not a bad teacher you just need to take some initiative and work hard.

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he is such a great guy! he's so so nice!

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Give him a break. He rocks, I love Mr Kosier, and I'm not just saying that cuz I'm a runner. Hes awesome

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Give the guy a break.

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NOT A GOOD COMPUTER PROGRAMMING TEACHER.More than half of his class have no clue what's going on. Including me. I dno't know whats the problem. Nice track coach. "GET OUTTA HERE!!"

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He seems really nice, but he dosen't seem like the best teacher. Hopefully he'll be fine this year, so far he's pretty decent.

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hes a great guy, but not a good math teacher...

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I had him for 2 years. Hated him the first year, and he was pretty good the next. Nice guy just not a great teacher

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this guy can't teach for anything. i wish i had some clue of what's going on.

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he tries to be funny but he's not. he asks if we have questions but doesn't go over things so we don't know what we got wrong to ask questions about

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he's a cool guy... and i did ok in his class. Just be sure to do your home work and you'll be fine.

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He's definitely a very nice guy but not a good teacher at all...I taught everything to myself

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i feel like gouging my eyes out when i'm in his class. he spends most of the class time making lame jokes, but...at least he's trying to be a nice teacher....

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Mr. K - You need to let us work on our stuff. Don't keep talking.

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really good track coach. really pushes u and my mile time is now sub 6

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i heard hes not a good teacher but hes an ok track coach

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Mr. Kosier is ok, out of my 5 math teachers though, he's #5

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i havent had him but he was my xc coach 4 part of the season and he rocked!

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people are mad jsut mad becasue they dont have a date for date night. your rule

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Really good for programming, even if he dosen't know it all.

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hes a good teacher( i did well) pretty nice also

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He doesn't TEACH anything

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coach kosier is awesome. G-LAND running all the way

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Hey coach your the man! Go guilderland track!!! -- EC

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Learn more about Guilderland High School

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4-star
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3-star
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2-star
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Based on 3,943 Ratings
Guilderland High School is a public high school located in Guilderland Center, New York and part of Guilderland Central School District. Guilderland High School is ranked 1,211 in New York. Learn More