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SAT/ACT Math, Calculus, Physics, Algebra, Geometry, Chemistry Expert
David J.

5.0 (714 ratings)

2,602 hours tutoring

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Hourly Rate: $219
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About David

Bio

Some tutors teach formulas. I teach students how to think like problem-solvers!

Hi, I’m David—a CSET-credentialed educator, Rice University Physics & Mathematics grad, and lifelong learner who believes math and science don’t have to be intimidating. I’m here to make concepts click, boost confidence, and even spark a little curiosity along the way.

My own academic path took me from Rice (Top 20 school, 3.8 GPA) to earning a Master’s in Teaching from Western Governors University. That...

Some tutors teach formulas. I teach students how to think like problem-solvers!

Hi, I’m David—a CSET-credentialed educator, Rice University Physics & Mathematics grad, and lifelong learner who believes math and science don’t have to be intimidating. I’m here to make concepts click, boost confidence, and even spark a little curiosity along the way.

My own academic path took me from Rice (Top 20 school, 3.8 GPA) to earning a Master’s in Teaching from Western Governors University. That combination of deep content knowledge and practical teaching training means I know not only what to teach, but how to teach it so it sticks.

As a Korean-Canadian-American, I understand that every student learns differently. I’ve worked with learners from all kinds of backgrounds, adapting my methods to fit their pace, strengths, and goals—whether it’s mastering Pre-Algebra, tackling Calculus BC, or breaking down college-level Physics and Chemistry.

Test prep is another specialty. I’ve been there—scored a 2260/2400 SAT with a perfect 800 in Math—and I help students tackle the SAT, ACT, ISEE, AMC, Kangaroo, SSAT, and more with strategies that work in the real testing room.

If you’re looking for a tutor who combines high-level credentials with a low-pressure, results-driven approach, we should talk. Let’s make sure your next test or class feels manageable—and maybe even enjoyable.

I can help you master SAT Math, ACT Math, Pre-Algebra, Algebra 1, Algebra 2, Geometry, Trigonometry, Pre-Calculus, College Calculus, Calculus AB, Calculus BC, IB HL math, Financial Mathematics, and Quantitative Game Theory, AMC/Kangaroo Math Competitions, AP Physics 1, AP Physics C, AP Chemistry, and Elementary Korean.

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Education

Rice University
Mathematics and Physics
Western Governors University (MEd; Teaching, Mathematics Education)
Masters
STEM Teacher Training & Professional Development (Los Angeles ORT College)
Graduate Coursework
  • Licensed teacher

Policies

  • Hourly Rate: $219
  • Rate details: Sessions finished earlier will be charged in full. Cancellation policy is strictly enforced. Group session rate: 25% discount
  • Lesson cancellation: 24 hours notice required

  • Background check passed on 7/1/2023

  • Your first lesson is backed by our Good Fit Guarantee

Schedule

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Approved Subjects

ACT Math

ACT Math

Overall score: 35 ACT Math: 36 Taught over 1000 students in ACT Math and Science.
ADHD

ADHD

With extensive experience teaching math to students with ADHD, I specialize in creating personalized, engaging lessons that cater to diverse learning styles and maintain focus. I use clear, step-by-step explanations combined with hands-on activities and frequent breaks to help manage attention challenges. My approach emphasizes building confidence through positive reinforcement and practical strategies that make abstract concepts accessible and memorable. By fostering a supportive learning environment, I help students develop strong math skills while also improving their concentration and study habits.
Algebra 1

Algebra 1

I’ve taught all levels of math up to Calculus 3. Over 1200 students taught in career.
Algebra 2

Algebra 2

I bring extensive expertise in Algebra 2, having successfully taught over 2000 students in the subject and guiding them through advanced topics, ultimately preparing them for Calculus. My teaching approach emphasizes a strong foundation in Algebra 2 concepts, ensuring students are well-equipped for more advanced mathematical challenges. Additionally, I have specialized in coaching students for the SAT and ACT, with a focus on the math and science sections, contributing to their overall success in standardized testing. My commitment to fostering comprehensive understanding and application of Algebra 2 sets the stage for students to excel in higher-level mathematics and standardized exams.
AMC (Competition math)

AMC (Competition math)

With over 10 years of tutoring experience, I’ve guided students through the challenges of AMC Math competitions by developing strong problem-solving techniques and creative mathematical thinking. I focus on sharpening skills in number theory, combinatorics, geometry, algebra, and logic—core topics essential to success on the AMC. My approach emphasizes pattern recognition, strategic reasoning, and time-efficient methods tailored to each student's strengths. From building foundational skills to tackling Olympiad-level questions, I help students grow in confidence and excel in competitive math environments.
Calculus

Calculus

AP calc AB: 5 AP calc BC: 5 2000+ students AP calculus and college calculus With a wealth of experience, I have successfully taught over 2000 students in Algebra, guiding them seamlessly through the intricacies of Calculus, including Multivariable Calculus. My expertise extends beyond traditional classroom instruction, as I have dedicated efforts to preparing students for the SAT and ACT, particularly excelling in the math and science sections. Through a comprehensive approach, I empower students to not only grasp the complexities of Calculus but also excel in standardized testing, contributing to their overall academic success. My commitment to cultivating a deep understanding of Calculus ensures students are well-prepared for advanced mathematical challenges.
Chemistry

Chemistry

AP Chem: 5 IB Chem HL: 7 College Chemistry: A/A+ Organic Chemistry: A- Dental School 4 years
Common Core

Common Core

With extensive experience teaching Common Core Math, I specialize in creating personalized, engaging lessons that cater to diverse learning styles and help students maintain focus. I use clear, step-by-step explanations combined with hands-on activities and frequent breaks to support effective learning. My approach emphasizes building confidence through positive reinforcement and practical strategies that make Common Core standards accessible and memorable. By fostering a supportive learning environment, I help students strengthen their math skills while improving concentration and study habits.
Elementary (K-6th)

Elementary (K-6th)

I have several years of experience teaching elementary school math, focusing on building strong foundational skills in number sense, addition, subtraction, multiplication, division, and basic geometry. I create fun and interactive lessons that engage young learners and help them develop confidence in problem-solving and critical thinking. My approach includes using visual aids, games, and real-world examples to make math concepts relatable and easy to understand. I am dedicated to supporting each student’s unique learning style and pacing to ensure lasting success and a positive attitude toward math.
Elementary Math

Elementary Math

I've taught over 1100 students in Algebra, Geometry, Precalculus, and Calculus. I work with a school so I've seen EVERY type of student out there and I'm able to adapt very quickly.
Finite Math

Finite Math

With over a decade of tutoring experience, I have helped students master Finite Math concepts including matrices, linear programming, logic, probability, counting principles, and financial mathematics. I specialize in breaking down abstract ideas into clear, step-by-step strategies tailored to each student’s learning style. My background includes working with high school and college students to build confidence and problem-solving skills in real-world math applications. Whether preparing for exams or completing assignments, I provide structured support to ensure long-term understanding and academic success.
GED

GED

Did not take GED, but am a college graduate. Tutored hundreds of GED students. Many scored perfect 200.
Geometry

Geometry

Took up to Calculus 3 in college. I've taught every math and science-related subjects up to Calculus 3. Over 1000 geometry students taught.
GRE

GRE

Quant: 169/170 Verbal: 166/170
Korean

Korean

-Lived in Korea until high school speaking only Korean. -Took Intermediate/Advanced level Korean in College. -I speak Korean with my family and friends -I watch Korean shows and read Korean articles on a daily basis.
Physics

Physics

AP Physics 1: 5 AP Physics 2: 5 College Engineering Physics: A Drawing on extensive experience and expertise, I possess a profound understanding of Physics, having taught and guided numerous students through the intricacies of the subject. My instructional approach emphasizes a hands-on and practical understanding of fundamental principles, ensuring students not only grasp theoretical concepts but also apply them effectively. With a track record of fostering a deep appreciation for Physics, I've successfully mentored students to excel in both theoretical understanding and practical problem-solving. My commitment to cultivating a passion for Physics and facilitating a comprehensive grasp of its principles positions students for success in academic pursuits and beyond.
Prealgebra

Prealgebra

Taught over 1000+ students in Pre-algebra, Algebra, Geometry, Precalculus, and Calculus
Precalculus

Precalculus

Precalculus: A+ Calculus: A+ College Calculus: A Taught over 1000 Precalc students in my career. Boasting extensive experience and expertise in Precalculus, I have effectively instructed and mentored students through the complexities of this foundational mathematical subject. My teaching approach focuses on building a solid understanding of algebraic and trigonometric concepts, ensuring students are well-prepared for advanced coursework in calculus and beyond. Through targeted instruction and practical applications, I foster a comprehensive grasp of Precalculus, empowering students to tackle higher-level mathematical challenges with confidence. My commitment to promoting mathematical fluency and problem-solving skills positions students for success in Precalculus and lays a robust foundation for further mathematical pursuits.
SAT Math

SAT Math

SAT math: 800 ACT Math: 36 I've taught 1000+ students SAT math and helped all of them reach 750+ on the math section (a third of them got 800). Bringing a wealth of experience and expertise to SAT preparation, I specialize in helping students achieve exceptional scores, particularly in the math section. Through my own unique techniques, I have successfully guided numerous students to attain scores of 780 and above in the SAT math section. My approach combines comprehensive content review with strategic test-taking skills, ensuring that students not only master the material but also excel in navigating the nuances of the SAT. With a proven track record of success, I am dedicated to empowering students to reach their highest potential in SAT performance.
SSAT

SSAT

SAT Math 800 SSAT: taught for 8 years
Trigonometry

Trigonometry

I've taught over 1100 trig students integrated with other Algebra and Precalculus topics. It's personally my favorite subject to teach as it is where most students struggle with and the topics remain important all the way up to Calculus. I have use a method that most school teachers don't - they make students memorize a unit circle cheat sheet, which the students become overly dependent on. I'm happy to teach all my ways.
ACT Science
Differential Equations
Elementary Science
GMAT
Microsoft Excel
Probability
PSAT
Statistics
Study Skills

Examples of Expertise

David has provided examples of their subject expertise by answering 8 questions submitted by students on Wyzant’s Ask an Expert.

See all of David ’s answers ›
David J.'s Photo

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Response time: 23 minutes

Ratings and Reviews

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5.0 (714 ratings)
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Reviews

Simply the Best Tutor on Wyzant!

We feel incredibly fortunate to have found David after trying several other tutors. Over the course of 28 lessons, he has been an outstanding tutor for my son in both Algebra/SAT Math and Physics. David has a remarkable talent for making complex subjects engaging and understandable. Each lesson is high-quality, effective, and interesting, which has made a huge difference in my son's attitude towards learning. As a parent, it's a joy to see my son genuinely look forward to his tutoring sessions. Furthermore, David's communication is excellent. He is professional, responsive, and always keeps me informed. We couldn't be happier with the experience and wholeheartedly recommend David to any family looking for a top-tier tutor. He is truly the best!

Miller, 29 lessons with David

Tutor that Gets the Job Done!

We started tutoring with David in July of 2025 with the sole goal of improving our son's math SAT before the August test date. Our son ended up raising his Math SAT score to a 790! That was an increase of 130 points in less than two months. David's tutoring works and that score is the evidence to prove it. So appreciative of his help!

Jenelle, 10 lessons with David

Fantastic tutor- my son finally hit is target SAT score!

My son has taken the SAT three times. He could not get past 740 on the math section. We hired two other tutors, and the scores were even lower. I found David, and he worked with my son for just over two months to prepare. My son found him patient, clear in delivery, kind, and very intelligent. He really enjoyed his sessions with him. My son just took the August SAT and hit a 780 on math- putting him over the 1500 mark! We are all so happy with the results. I am so grateful for David and highly recommend! A++++

Cynthia, 7 lessons with David

Expert SAT Math Tutor Who Delivers Results (My GOAT)

I worked with David for SAT math prep and thanks to him I was able to score a 780. What stood out immediately was his demeanor which is relaxed and calm yet always straight to business. He never wasted time but he also made every session feel manageable and stress free. He really has an acute conceptual understanding of the toughest SAT math questions. When most tutors just teach tricks he dives into the underlying ideas which is exactly what makes the difference once you are scoring above 700. Post 700 SAT math really is a different ball game and David knows how to guide you through it. He also really tries to make a plan and strategy that works for you. We had contacted other tutors who ran away when we asked them to analyze critically what my strengths and weaknesses were but David embraced it. He took me from a 710 to a 780 by focusing on the areas that mattered most. I would really reccomend him to anyone trying to crack the toughest parts of SAT and I really owe a large part of my success to him

Viv, 8 lessons with David

Great Tutor.

Me and David went over a bluebook practice test together and reviewed some harder problems and concepts. David helped me understand the material and gave me the tools to practice.

Arno, 10 lessons with David

Amazing SAT Prep Tutor

David is great and my son did SAT Math Prep with him . He is very knowledgeable and patient. My son really liked his way of teaching and felt confident with SAT Math. I highly recommend him.

Prisy, 10 lessons with David

Best SAT Math Tutor Out There!

First, David is super friendly and organized. He's very nice but also doesn't sugar coat things - you'll know what you need to work on. Other tutors will help you with your specific questions, but David has an entire process for uncovering where you need help and then focusing on those areas. I wish we would've started with him in the first place!

Tim, 9 lessons with David

Knowledgeable and patient tutor

David has been an excellent SAT Math tutor for my daughter. He explains concepts clearly, is very patient, and always arrives on time. He’s flexible with scheduling and truly cares about student success. My daughter made great progress under his guidance. We’re very grateful for his help!

Eva, 16 lessons with David

Knowledgeable and patient

David was great!!! My daughter really enjoyed the session with him. He is very knowledgeable and organized. Easy to book and work with him. She is looking forward to the next session.

Rebecca, 3 lessons with David

Patient, knowledgeable and friendly

My daughter has worked with several tutors and David is one of her absolute favorites. She looks forward to her calculus sessions with him which is definitely saying a lot! He’s easy to work with, patient, explains difficult concepts in a simple manner, and she comes away from her time with him confident and prepared. He’s one of the best tutors we’ve worked with. He’s also very friendly and easy-going, which makes the sessions feel fun and enjoyable - which again is saying a lot when it comes to calculus. Definitely recommend David!!

Robyn, 10 lessons with David
Hourly Rate: $219
Response time: 23 minutes
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