Average 4.99 based on 28 teacher ratings
Greg Korshavn is a Math teacher at Westlake High School located in Westlake Village, California and part of Conejo Valley Unified School District. Greg Korshavn's 28 teacher ratings contributes to Westlake High School's ranking of 1,078 in California. Additionally, the average teacher rating at Westlake High School is 3.87 stars.
4
Easiness
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Helpfulness
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Clarity
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Knowledge
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Textbook Use
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Exam Difficulty
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Recommended
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Easiness
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Helpfulness
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Exam Difficulty

I rank most of my teachers in two ways, as great teachers and as great people. Mr. Korshavn is at the top of both categories. Not only is he phenomenal at teaching difficult math concepts, but he also give tips, reminders, and anecdotes that are very relatable for seniors who are graduating. I miss him! :( Math is one of my strongest subjects, but I must say that calc was no breeze for me. It is innately difficult, but you won't find another calc teacher as good as Mr. Korshavn!

5
Recommended
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Easiness
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Helpfulness
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Clarity
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Knowledge
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Textbook Use
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Exam Difficulty

One of the greatest teachers I have ever had!!

5
Recommended
5
Easiness
5
Helpfulness
5
Clarity
5
Knowledge
5
Textbook Use
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Exam Difficulty

I love this teacher. Does what is right in order to get his students to succeed.

5
Recommended
3
Easiness
5
Helpfulness
5
Clarity
5
Knowledge
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Textbook Use
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Exam Difficulty

Sometimes he'll tell a story and I'm not sure how he got there but it's still entertaining. 11/10

5
Recommended
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Easiness
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Helpfulness
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Clarity
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Knowledge
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Exam Difficulty

I specifically came onto this website to rate him. I LOVE THIS MAN!!! ONLY knowledgable math teacher on the whs campus (except mr scott is good too). otherwise they are all morons. i am not a math person at all but i swear to god he made algebra 2 a breeze for me. is avaibale a lot, always helps, is never mean. u can go to the restroom whenevr u please, gives free time at the end of class. just pay attention and do the hw. dont be rude to this poor man he is the nicest person ive ever met

3
Easiness
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Helpfulness
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Clarity
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Knowledge
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Textbook Use
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Exam Difficulty

Mr. K is a beast

3
Easiness
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Helpfulness
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Clarity
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Knowledge

After having to put up with year after year of rude and/or apathetic math teachers at WHS, Mr. Korshavn, to me, was a burst of fresh air. He presents the material in such a clear and concise manner, and he is also a very compassionate person in general. He never raises his voice or makes insulting remarks, and overall, I really miss being in his class. Why can't math teachers be this good???

3
Easiness
5
Helpfulness
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Clarity
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Knowledge

One of the best teachers I have ever had in my life, very helpful and understanding and will answer any and all questions students have

4
Easiness
5
Helpfulness
5
Clarity
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Knowledge

Korshavn is literally the best teacher I've ever had. He makes Calculus SO EASY and has the driest sense of humor, the best stories, and awesome teaching tools.

5
Easiness
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Helpfulness
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Clarity

You will never get a better math teacher. Ever. It's not possible, the whole package is there. Nice, clear, understanding, funny, and MOST IMPORTANTLY knows how to teach the subject well! You must have him or your high school experience at Westlake is not complete. He's been teaching there since the

2
Easiness
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Clarity

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Easiness
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Clarity

Best Math teacher EVER!!!!!

5
Easiness
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Helpfulness
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Clarity

Legitimately the best math teacher you will ever have.

5
Easiness
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Clarity

best math teacher EVER.

5
Easiness
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Clarity

All i have to say is GREAT GUY!!!!!

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Easiness
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Clarity

Mr Korshavn is an excellent teacher. He is very organized and puts all information online which is extremely helpful. There are no surprizes on test day.

3
Easiness
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Helpfulness
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Clarity

take notes and keep those notes if you're planning on taking calculus in college. they'll keep you afloat even in a school like Berkeley. excellent teacher.

3
Easiness
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Helpfulness
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Clarity

Mr. Korshavn is the most AMAZING teacher in world. He make calculus easy and fun. He's awsome, funny and the smartest man ever. You ROCK Mr. K!

3
Easiness
5
Helpfulness
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Clarity

The best teacher I have ever had. Wish all my teachers could be just like him. Extremely smart and nice.

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Easiness
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Helpfulness
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Clarity

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Easiness
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Clarity

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Easiness
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Clarity

Love this man.

3
Easiness
5
Helpfulness
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Clarity

The perfect teacher. He teaches calculus with such clarity and precision. Though he seems rather mild, he has a great sense of humor.

3
Easiness
5
Helpfulness
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Clarity

Korshavn loves teaching and tho calc isn't exactly thrilling, hes one of those teachers that everyone wants to get

3
Easiness
5
Helpfulness
4
Clarity

He's the man at WHS, most consistently helpful

3
Easiness
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Helpfulness
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Clarity

Best teacher I've ever had. Ever. He takes a stressful subject like Calculus and makes it a stressfree and positive environment.

2
Easiness
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Helpfulness
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Clarity

awesome

5
Easiness
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Clarity

Teaches complicated material in terms anyone can understand, just make sure to take notes, they're a lifesaver

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Learn more about Westlake High School

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Based on 1,545 Ratings
Westlake High School is a public high school located in Westlake Village, California and part of Conejo Valley Unified School District. Westlake High School is ranked 1,075 in California. Learn More