Reza Ghamarshoushtari
Math Tutor
I am a Ph.D. mathematician and senior mathematics educator teaching since 2010 and online since 2014. I have taught university courses and supported students from middle school through advanced university mathematics. My expertise includes algebra, geometry, calculus, linear algebra, probability, differential equations, SAT, ACT, GRE, MCAT quantitative preparation, and AMC competitions. Recognized as TutorOcean’s top-ranked five-star math tutor and among Chegg’s top three math tutors.
5.0
31 reviews
31+
Lessons taught
16
Years experience
1
Location
Math coaching built around your goals
I help students from middle school through advanced university mathematics build understanding, accuracy, confidence, and independent problem solving. I am a Ph.D. mathematician and senior mathematics educator who has taught since 2010 and online since 2014. For students in New York and beyond, I provide personalized online coaching in algebra, geometry, calculus, linear algebra, probability, differential equations, SAT, ACT, GRE, MCAT quantitative preparation, and AMC competitions. I begin by identifying your strengths, gaps, goals, and learning style, then structure each lesson around clear explanations, guided practice, and strategic problem solving. My approach is patient and organized, with an emphasis on deep understanding rather than memorization. Online lessons include live screen sharing, digital whiteboard instruction, handwritten notes, PDF annotation, and visual tools such as GeoGebra when useful.
See Reza Ghamarshoushtari in Action
Virtual lessons with Reza
Live video sessions — your tutor sends the call link before your lesson.

Starter pack
4 private 60-minute lessons to build your fundamentals, with a clear focus for every session.
- 4 private 60-minute lessons
- A focus for each session
- A plan to keep improving between lessons
$240 total
“Reza is, without exaggeration, one of the most exceptional tutors I have ever worked with. He has an extraordinary ability to make even the most difficult math concepts feel clear, logical, and approachable. What sets him apart is that he does not simply help you get through a problem — he makes sure you truly understand the reasoning behind every step, so you leave the session stronger, more confident, and more independent. He is incredibly knowledgeable, patient, and precise, and he teaches with a level of clarity that is honestly rare to find. Every session with him feels focused, valuable, and tailored to exactly what the student needs. Beyond his expertise, he is professional, encouraging, and genuinely invested in helping his students succeed. Working with Reza did not just help me improve in math; it changed the way I approach learning it. I would recommend him without hesitation to any student who wants outstanding support and real results.”
Maria G.
What Students Say
Jasmine I.
1 lesson
Incredible Tutor!!!: Reza is a highly skilled and dedicated tutor whose guidance has made a real difference for me. He is extremely knowledgeable; no matter what question I throw at him, he answers it on the spot very clearly. He always breaks down complex concepts with ease. One of the things I appreciate the most is his pacing as he is constantly checking in to make sure I understand before moving on. He always encourages me to ask questions and never makes me feel embarrassed about it. Every session has been valuable and after just a couple of lessons my grades have improved significantly. I feel much more prepared and capable thanks to Reza’s support. I strongly recommend to anyone looking for a skilled, kind and patient tutor who is invested in your progress!!
Laila A.
1 lesson
Working with Reza over a longer period of time made a major difference in my performance in Linear Algebra, Calculus, and Discrete Math. He explains challenging material very clearly and makes even difficult topics feel much more manageable. He is patient, highly knowledgeable, and genuinely cares about his students’ progress. Over time, his support helped me build a much stronger understanding of the material and a lot more confidence in solving problems on my own. With his help, I achieved strong results on my assignments, quizzes, midterm, and final exam. I would highly recommend him to any student looking for consistent, high-quality math support.
Julie N.
1 lesson
Amazing Tutor! Reza is an amazing tutor for university-level math!! He is incredibly knowledgeable, and the way he approaches teaching is so easy to understand. Reza doesn't just go through problems with you - he makes it so that you understand the concepts behind them. He is efficient with your time, so you're not wasting a single dollar. He's also incredibly kind, and it is clear that he cares about his job and the people he tutors! He has very lovely advice on how to effectively approach your learning and studying, and you get access to the very helpful notes he makes you too. Very worth it!
Moe A.
1 lesson
Calc Prep for Midterm I’m a first year student at Wilfrid Laurier University and got tutoring with Reza for calculus test prep. I was feeling pretty lost before, but he explained concepts clearly and broke everything down step by step. He’s patient, checks your understanding, and focuses on exactly what you need for tests. The sessions really helped my confidence going into my calc exams, and I’d definitely recommend him to other students.
Tomas T.
1 lesson
Exceptional Tutor Earning a Parent’s Full Trust: We’re incredibly grateful for Reza and the dedication he brings to every session. With a very limited time and a challenging amount of material to cover, he’s doing what feels almost impossible — guiding our son with clarity, structure, and confidence. We fully trust him, and we’re amazed by how much progress our son has made in such a short time. This kind of support is truly rare
William A.
1 lesson
Calc Test Prep I needed last minute help with an upcoming calculus test and Reza responded almost instantly and accommodated my needs for tutoring that same day. He explained the material very well and worked with me to find a way for me to best memorize and understand the concepts on the test. His primary focus is to make sure you understand the material so you can do well.
Frequently Asked Questions
Everything you need to know before booking with Reza.
How much do online math lessons cost in New York?
A single 60 minute math lesson on my site is $95. My package rate is $85 per lesson, and my membership rate is $75 per lesson. I also offer a Starter pack of four private 60 minute lessons with a focus for each session and a plan for continued improvement.
Where can I take math lessons in New York?
I offer online math lessons, so students in New York can join from home or another convenient location. Lessons can be delivered through Zoom, Google Meet, or Microsoft Teams. I use screen sharing, a digital whiteboard, handwritten solution notes, PDF annotation, and visual mathematics tools such as GeoGebra.
What levels and subjects do you teach in math?
I support students from middle school through advanced university mathematics and have taught university courses. My subjects include algebra, geometry, calculus, linear algebra, probability, differential equations, SAT, ACT, GRE, MCAT quantitative preparation, and AMC competitions.
What should I bring to an online math lesson?
Please bring your textbook, syllabus, class notes, assignments, review sheets, practice tests, and specific questions you want to address. Sharing relevant materials before the lesson helps me prepare efficiently. You should also have paper, a pencil, and any calculator permitted for your course or examination.
Ready to Start?
Reza is available throughout the week for lessons. Pick a time that works for your schedule.
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Cancellation
Free cancellation up to 24 hours before your lesson.