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Top-Rated Math Tutor | Calculus, AMC Competitions, SAT/ACT | 15+ Year
Thomas K.

5.0 (507 ratings)

2,303 hours tutoring

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About Thomas

Bio

I hold a Master's in Education and a BA in Applied Mathematics from the University of California, Berkeley, giving me a deep understanding of complex concepts and their real-world applications. I am also a Certified Math Teacher.
Teaching & Tutoring Experience:
Summit Charter School: Classroom Math Teacher
AOPS: Math Competition Coach and Instructor for AMC 8, AMC 10/12, and Counting & Probability, test prep.
ACE: Served eight years as a Math Teacher and Director, guiding students through...

I hold a Master's in Education and a BA in Applied Mathematics from the University of California, Berkeley, giving me a deep understanding of complex concepts and their real-world applications. I am also a Certified Math Teacher.
Teaching & Tutoring Experience:
Summit Charter School: Classroom Math Teacher
AOPS: Math Competition Coach and Instructor for AMC 8, AMC 10/12, and Counting & Probability, test prep.
ACE: Served eight years as a Math Teacher and Director, guiding students through Algebra, Precalculus, AP Calculus AB/BC (AP Calc), and SAT/ACT test prep.
CL Academy: Algebra, Precalculus, AP Calculus AB/BC, Competition Math (AMC), and SAT/ACT, test prep/ exam prep.
C2 Education: online and in-person instruction in Precalculus, AP Calculus AB/BC, Multivariable Calculus, SAT/ACT, and Competition Math, test prep.

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Education

University of California Berkeley
Applied Mathematics
Alliance International University
Masters
  • Licensed teacher

Additional Languages

Korean

Policies

  • Hourly Rate: $120
  • Rate details: Group Sessions: For group sessions, an additional $20 per student. Notification Requirement: Request less than 24 hours before the lesson will charge the full lesson rate.
  • Lesson cancellation: 24 hours notice required

  • Background check passed on 5/20/2024

  • Your first lesson is backed by our Good Fit Guarantee

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Approved Subjects

ACT Math

ACT Math

I have taught the ACT Math for over ten years. I took a ACT Math test and received 36. I have unique materials for ACT Math prep and specific strategies for various students. I also worked for companies that provided ACT Math materials.
Algebra 1

Algebra 1

I am a math teacher at a public School with over ten years of experience teaching Algebra 1 in both school settings and academic tutoring programs. My deep understanding of the subject allows me to quickly identify and address common student misconceptions. I provide clear explanations, targeted practice, and personalized strategies to help students master algebraic concepts and build confidence in problem-solving.
Algebra 2

Algebra 2

I am a math teacher at a public School with over a decade of experience teaching and tutoring Algebra 2 in schools and academic programs. I have a strong grasp of the curriculum and can pinpoint and address common areas where students struggle, such as functions, quadratic equations, and advanced algebraic concepts. My lessons are designed to strengthen understanding, improve problem-solving skills, and prepare students for higher-level math courses.
AMC (Competition math)

AMC (Competition math)

I am a math coach with over a decade of experience teaching competitive math, specializing in AMC 8, AMC 10, AMC 12, and AIME test prep. I currently coach students at Art of Problem Solving (AOPS) for AMC 10 & 12. Many of my students have qualified for AIME and achieved excellent results in AMC competitions and other math contests. I focus on building deep problem-solving skills, strategic thinking, and contest readiness for students aiming to excel in math competitions.
Calculus

Calculus

I am a certified math teacher with 15+ years of experience teaching and tutoring Calculus, including AP Calculus AB, AP Calculus BC, and college-level Calculus I and II. I help students master limits, derivatives, integrals, applications, differential equations, series, polar/parametric topics, and AP free-response strategies. My lessons focus on building conceptual understanding, improving problem-solving accuracy, and preparing students for quizzes, exams, and the AP Calculus exam. I hold a degree in Applied Mathematics from UC Berkeley and a Master’s in Education.
Common Core

Common Core

With over a decade of experience teaching mathematics, I have guided students from Prealgebra to Calculus, fostering their understanding and appreciation of the subject. I currently work as an 8th grade math teacher at a middle school, where I have honed my ability to make complex concepts accessible to younger learners. Additionally, I have worked as a math tutor at an educational company, providing personalized instruction to help students succeed. I am also in the process of obtaining my single subject teaching credential, further solidifying my expertise and commitment to the field.
Elementary Math

Elementary Math

I am a certified middle school math teacher with extensive experience teaching middle school math and tutoring elementary students. My approach focuses on building a solid understanding of core concepts while fostering problem-solving skills and confidence. I create engaging lessons that help students develop a strong foundation and, most importantly, a love for math.
Geometry

Geometry

Middle school math teacher - 8th grade math Geometry specialist - 10 years + experience, knowledge in proving, def'n, theorem, properties, and other terms.
Precalculus

Precalculus

I am a math teacher at a public School with over a decade of experience teaching and tutoring Precalculus in both school and academic program settings. I have a strong command of topics such as functions, trigonometry, analytic geometry, and limits, and I know how to address the most common challenges students face. My approach focuses on building a deep conceptual understanding while developing problem-solving strategies that prepare students for calculus and higher-level mathematics.
Probability

Probability

I passed the P (actuarial test, received level 8). I took a Probability (stat class) in UC Berkeley and received an A. I have been teaching Probability class with college students and they successfully passed the class.
SAT Math

SAT Math

I’ve taught SAT Math for over ten years and scored a perfect 800 on the Digital SAT. I offer personalized strategies tailored to each student’s needs, whether you're aiming for a top score or building foundational skills. My lessons include unique prep materials I’ve developed, along with resources from top test prep companies I’ve worked with. Let’s work together to raise your score with focused, effective practice.
Linear Algebra
Prealgebra
Statistics
Trigonometry

Examples of Expertise

Thomas has provided examples of their subject expertise by answering 60 questions submitted by students on Wyzant’s Ask an Expert.

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Ratings and Reviews

Rating

5.0 (507 ratings)
5 star
(505)
4 star
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Reviews

Knowledgeable, patient, and incredibly effective tutor

Thomas K. has been an amazing AP Calculus AB tutor. He helped me with all the major topics in my course, including limits, derivatives, the Chain Rule, logarithmic and exponential functions, related rates, and applications of derivatives. Before working with him, many of these topics felt confusing and overwhelming to me, but Thomas explains everything in a clear way that makes even the hardest problems feel manageable. What I appreciate most about Thomas is his patience and how he makes sure I truly understand the concepts instead of just memorizing formulas. He always checks my work, explains mistakes in a calm and encouraging way, and shows me how to approach problems logically. His teaching style helped me build confidence in solving AP-style questions on my own. Thanks to Thomas, my understanding of calculus has improved a lot, and I feel much more prepared for my AP Calculus AB class tests and the AP exam. I’m now able to solve problems faster, avoid common mistakes, and actually enjoy learning calculus. I highly recommend Thomas K. to anyone looking for a supportive, knowledgeable, and highly effective math tutor.

Neil, 40 lessons with Thomas

Dedicated and Highly Effective Math Tutor

Thomas is an outstanding math tutor who is knowledgeable, patient, and highly focused on helping his students succeed. He quickly identifies each student's weak areas and explains concepts in a way that is easy to understand. He provides plenty of targeted practice problems to reinforce learning and build confidence. Thanks to his structured approach and personalized guidance, students feel well prepared for their class tests and AP exams. Thomas genuinely cares about his students' progress and goes the extra mile to ensure they understand the material. I highly recommend him to anyone looking for an effective and dedicated math tutor.

Jayaradha, 35 lessons with Thomas

Knowledgeable tutor with lots of materials

Mr. Thomas is very good at understanding what a student needs. From my first lesson, he was able to grasp my understanding of calculus and from there he immediately provided homework, practice material, and an overall study schedule to help me achieve a 5 on the AP exam.

Alvy, 41 lessons with Thomas

Highly Recommended for Advanced Math & AMC Prep!

We are very grateful to Thomas for his outstanding work with my son. Thomas has an exceptional ability to explain complex, advanced mathematics in a clear and structured way. Thanks to his guidance, my son has not only mastered challenging topics like quadratics and conic sections from the advanced AoPS curriculum but has also developed a genuine deep understanding of problem-solving methods. Thomas is a highly professional, dedicated, and motivating tutor who knows exactly how to prepare a student for competitive mathematics like the AMC 10 and 12. We highly recommend his classes to anyone looking for top-tier math coaching!

Polina, 7 lessons with Thomas

amazing tutor with clear explanations

We hired Thomas to help my daughter with AP Calculus and AMC10 prep, and the results have been fantastic. He brings a highly structured approach to his lessons and isn't afraid to set a high standard for his students. My daughter found his explanations very easy to understand and his techniques simple to follow. Working with him gave her a major boost in confidence with her Calculus material. He is an excellent tutor for students who want to excel and truly understand math.

Eddie, 21 lessons with Thomas

Very good tutor!

Thomas has a very well structured program for teaching SAT math. I could feel myself improve in every concept and even though it was a lot of work he is helping me be successful.

Sungsook, 13 lessons with Thomas

Explains concepts clearly

My son is usually very selective about his teachers, but he genuinely enjoys learning from Mr.Kim. He has been helping him prepare for an Algebra II test, and my son says he explains concepts clearly and makes difficult topics much easier to understand. We are very pleased with the experience so far.

Monica, 9 lessons with Thomas

Knowledgeable tutor

Thomas has been a great SAT math tutor so far. We recently started working with him, but we are already happy with his teaching style and the support he provides. He explains concepts clearly, makes the sessions comfortable, and we are happy to continue with him.

Elcin, 8 lessons with Thomas

Best Tutor

Ethan has been an outstanding instructor for our child. He is knowledgeable, patient, and highly effective at keeping students engaged and motivated. One of Ethan’s greatest strengths is his ability to explain challenging concepts in a clear and approachable way. He encourages students to think independently, ask questions, and develop confidence in their own problem-solving abilities rather than simply providing answers. He creates a positive and supportive learning environment where students feel comfortable taking on new challenges. Our child has not only improved academically but has also become more confident and enthusiastic about learning. Ethan is professional, reliable, and genuinely invested in the success of his students. We are very grateful for his dedication and highly recommend him to any family looking for an exceptional tutor and mentor.

See young, 4 lessons with Thomas

Marvelous teacher, even for adults

Thomas is a gem. He helped me prepare for a project. He is direct and has clear expectations that define how to learn and study. I am grateful to work with him. My only fear is that he will become so busy that he doesn’t have time for my next project!

Selena, 21 lessons with Thomas