Mr. Chi-Sun: SAT Math, Math Olympiad, Computer Science, and Economics 1:1

I placed 2nd in the 1989 Colorado Math Olympiad and graduated from high school at age 15. I went on to earn a Bachelor of Science in Computer Science with a minor in Economics from MIT, graduating at age 19. I am now retired and I have been tutoring students for the past 12 years.

Location

See the event details for rates

Online classes

About

About the tutor: Mr. Chi-Sun

I placed 2nd in the 1989 Colorado Math Olympiad and graduated from high school at age 15. I went on to earn a Bachelor of Science in Computer Science with a minor in Economics from MIT, graduating at age 19. While at MIT, I was inducted into both Eta Kappa Nu (top 10% of Electrical Engineering and Computer Science majors) and Tau Beta Pi (top 10% of the class) honor societies.

Following MIT, I worked as a software developer for four years before earning an MBA in Finance from Indiana University Bloomington, where I graduated at the top of my class. I then spent 15 years as an equity derivatives trader at major investment banks, including Goldman Sachs, Lehman Brothers, Bear Stearns, and HSBC.

I am now retired and I have been tutoring students for the past 12 years. I specialize in all levels of mathematics, with a particular focus on competition math (AMC 8/10/12, AIME). I also tutor computer science, finance, and economics.

In addition to my academic and professional experience, I was a member of the U.S. Men’s Table Tennis Team and won silver medals at the 1991 and 1995 Pan American Games.

Teaching fees:

Middle school math

USD75 per hour

High school math,

AP Macro-economics,

AP Computer Science,

SAT Math

USD95 per hour

Multi in High school

USD110 per hour

Competition math

USD110 per hour

College math

USD110 per hour in general

If it takes the tutor excessive time to prepare for the lesson, he will charge an additional fee.

2.5% off if paid 12-lesson package

5% off if paid 24-lesson package

Rescheduling policy

Any cancellation or rescheduling of lessons requires 24 hours notice. Any cancellation or rescheduling within 23 hours will be charged a USD10 fee unless the teacher waives the fee for her/his students.

6% credit card / Paypal fee

A 6% credit card / Paypal fee is included in the prices below. Please use Zelle to avoid paying the 6% fee if you are in the USA. Email info@camathories.com for the Zelle address.

Tickets

USD75 per hour rate
A 6% credit card / Paypal fee is included in the price.
$79.78
Quantity
USD95 per hour rate
A 6% credit card / Paypal fee is included in the price.
$101.06
Quantity
USD110 per hour rate
A 6% credit card / Paypal fee is included in the price.
$117.02
Quantity
USD75/hour 12 lessons 2.5% off
A 6% credit card / Paypal fee is included in the price.
$933.51
Quantity
USD95/hour 12 lessons 2.5% off
A 6% credit card / Paypal fee is included in the price.
$1,182.44
Quantity
USD110/hour 12 lessons 2.5%off
A 6% credit card / Paypal fee is included in the price.
$1,369.14
Quantity
USD75/hour 24 lessons 5% off
A 6% credit card / Paypal fee is included in the price.
$1,819.14
Quantity
USD95/hour 24 lessons 5% off
A 6% credit card / Paypal fee is included in the price.
$2,304.25
Quantity
USD110/hour 24 lessons 5% off
A 6% credit card / Paypal fee is included in the price.
$2,668.08
Quantity

Total

$0.00

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Ms. Coral is the math teacher for our two elementary school children, and we are incredibly grateful for her. She is an experienced math teacher who is patient, caring, and flexible, and she truly cares about our kids’ overall growth. She consistently evaluates their learning levels and keeps challenging them appropriately to help them continue learning and growing. She also knows how to spark their interest in math problems, making lessons engaging and motivating. In addition, she provides us with constant feedback on their progress and interests, which we really appreciate as parents. She is amazing, and we highly recommend her.

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Fantastic!

The mahjong class was fantastic—Kit made learning the tiles and strategies so approachable and fun that I'm already hooked on the game and can't wait to play more!

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Ms JQ is great!

Ms. JQ is great. She is consistent and patient!

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First Grader Now Loves Math

Our daughter was uninterested in math and struggling with some concepts. She was resistant to any help from us. After 8 sessions with Dr. Kit, we have seen an amazing transformation. Our daughter is truly enjoying math and has progressed tremendously with critical thinking and problem solving skills. We are so grateful to Dr. Kit!

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The best math teacher (Ms. Coral) with lots of patience for the kids!

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Mother of a four years old participant

"Dear CAMathories, We were super delighted to participate in such a unique drawing competition. And to explain my child the changes cause and effects of Climate and it's changes made him aware of so many new concepts. Heartful Thank-you for this beautiful opportunity. " - mother of a four years old participant of our 2nd International MathArt Contest 2021/22. "Climate Change. Draw Your Story with Shapes!.

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Kit gives a deep appreciation for Mahjong!

Kit gave such a wonderful overview of the history and origins of Mahjong along with details of how to play the game. Her passion and expertise really came through! Highly recommend her for learning this fun game with so much history.

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Ms JQ does private Mandarin lessons at…

Ms JQ does private Mandarin lessons at our home for our daughter and a friend. She has so much energy and is great at interacting with young ones! Highly recommend.

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Cantonese class with Dr. Kit

Our 7 year old son has been a student of Dr. Kit for about a year. He attends her Cantonese classes with his friends on a weekly basis. Dr. Kit comes highly recommended by our friend. She is kind, patient and engaging. Through readings, maths, storytelling, songs and games; our son has shown amazing progress! He is no longer shy to speak the language, and was even able to do a short presentation at the end of the year. Dr. Kit also organizes fun traditional festival celebrations, gatherings and outings where kids put their learnings in practical use. It is wonderful for us to meet other parents and students too. Thank you Dr. Kit! We are so lucky to have you as our Cantonese teacher!

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5/16/25

Highly recommend Coral Lohsi!

We've really appreciated Coral Lohsi as my kids' Cantonese math teacher. My 3rd grader likes that the math is more challenging than the math he does in school, that she integrates characters that he likes into the word problems, and that she is very nice and patient. My 5th grader likes that she is a gentle teacher and helps him work through problems that he doesn't understand.

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5/8/25

Cantonese class

My now 6 year old daughter has been a student of Dr. Kit for two years and we’ve had an excellent experience. The class is focused on Cantonese language with math lessons seamlessly weaved in. Dr. Kit makes challenging content approachable and keeps the students engaged. My daughter especially enjoys the educational songs and games. Dr. Kit also provides insightful feedback and truly cares about her students and their progress. I highly recommend Camathories.

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Danielle A.

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1/1/22

A mother of two young children in New York

My 4-year-old son has played your game Goldilocks. He likes it very much! I think it is a very good learning game. You can listen to the story while playing math games. It is really fun, and it helps children to "associate" math with the games and their daily lives.

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Math Tutoring - positive

Ms. Coral has been working with my eight grade daughter for the past 3 months on improving her math skills and her understanding of fundamental concepts. She is very patient and is good at explaining things in a way that makes it easy for the student to understand. She is genuinely concerned about her student’s progress and makes it a point to check in after tests.

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BengLi O.

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11/25/25

We had a great time learning the…Mahjong

We had a great time learning the Classic Chinese style of Mahjong from Kit. She is a wonderful, knowledgeable and so patient teacher. Thanks Kit!

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5/25/25

Very patient and organized teacher

My 7-year-old son has been taking Cantonese lessons with Dr. Kit/Camathories for several months. She is extremely patient and kind and does a great job of encouraging my son to speak more. She is also very organized and makes sure each lesson builds upon the previous one. She will tailor the classes to your wishes (we wanted more Cantonese than math and that’s what we are getting). Thank you Dr. Kit!

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Passionate Cantonese teacher

Dr. Kit is very knowledgeable in Hong Kong's children's games and she has a lot of patience in teaching my son Cantonese. I can see the improvement in my son's vocabulary and the willingness for him to read Chinese from her class. I can not ask for a better teacher and if I can choose, I want her to teach my son Cantonese and math throughout his entire education.

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5/1/23

Mother of an eight-year-old participant

"Many thanks for the opportunity for young kids and the encouragement that this contest opens up thinking of Maths in an artistic way." - mother of an eight-year-old participant in our 3rd International MathArt Contest 2022/23, "Love our world. Draw your story with shapes and numbers.

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A grandfather in New Jersey

Knowing and loving the familiar fairy tales already, my granddaughter (turning 4) enjoys being able to interact in a way that moves the stories along, and I appreciate that she is honing her counting and analytical skills while doing so.

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Robert H.

Mr. Chi-Sun: SAT Math, Math Olympiad, Computer Science, and Economics 1:1

Location

About

Tickets

USD75 per hour rate

USD95 per hour rate

USD110 per hour rate

USD75/hour 12 lessons 2.5% off

USD95/hour 12 lessons 2.5% off

USD110/hour 12 lessons 2.5%off

USD75/hour 24 lessons 5% off

USD95/hour 24 lessons 5% off

USD110/hour 24 lessons 5% off

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