SAT Tutoring with Olivia Bang
One-on-one SAT Reading & Writing and Math instruction with a Johns Hopkins graduate and former Hackers and Ivy Plan instructor. Build stronger grammar, passage reasoning, and pacing. Based in Diamond Bar, with live Zoom lessons nationwide.
Build a plan around your mistakes
Grammar rules you can apply.
Passage evidence before answer choices.
Timing based on your performance.
An error log that guides your next lesson.
Based in Diamond Bar · Serving Walnut, Chino Hills, Irvine and nearby communities · Online nationwide
One Proven Method.
Olivia Bang founded Gangnam Prep after training at Seoul's most elite test prep academies — Hackers and Ivy Plan — and earning her degree from Johns Hopkins University.
Her Logic-First Framework isn't a collection of tips. It's a complete system for how to think about the Digital SAT — built over 17 years of one-on-one instruction with students across Diamond Bar, Walnut, Brea, and Fullerton.
Chain. A Specialist.
Gangnam Prep was built on one insight: the SAT is not a knowledge test — it's a logic exam with a very specific structure. Once students understand that, everything changes.
Logic-First Framework™
Every question has a logical core. We train students to isolate it — replacing guessing with principled reasoning that holds up on every test date.
3-Round Scan & Strike™
A structured, proprietary pacing method that supports time management and helps students prioritize questions — built for students with demanding AP and extracurricular schedules.
17 Years. Johns Hopkins. Korea's Elite Academies.
Founder Olivia Bang trained at Hackers and Ivy Plan in Seoul and now teaches local and online students through Gangnam Prep.
to Score 1500+
A complete Digital SAT prep ecosystem — from diagnostic to test day — built around your student's specific gaps and goals.
Full Diagnostic Assessment
We begin every engagement with a complete Bluebook-style adaptive test. Every error is mapped by question type, skill domain, and timing pattern before we build your plan.
Personalized Study Plan
No two students get the same plan. Your diagnostic data, your test dates, and your target college benchmarks all shape a precision roadmap with measurable milestones.
Logic-First Instruction
Our flagship framework teaches students to decode the underlying logic of every question type in Reading & Writing and Math — eliminating guessing at its root.
Pacing & Timing Mastery
The 3-Round Scan & Strike method turns pacing from a weakness into a weapon — structuring each module for maximum point capture without sacrificing accuracy.
Bluebook Adaptive Mocks
Full-length adaptive practice tests that mirror the real Digital SAT experience — including the two-module structure, timing, and Desmos calculator access.
Progress Tracking & Debriefs
Every mock test is followed by a structured debrief. Students learn exactly why they missed each question — and how to apply the correction pattern on future tests.
Not a Generic Curriculum.
Diagnostic Assessment
Full Digital SAT simulation under timed conditions. Every result is analyzed before a single lesson begins.
Identify the Logic Pattern
Using the Logic-First Framework, students learn what each question type is actually testing — so they can apply one reliable approach across all variants.
Targeted Skill Drilling
We attack the specific domains driving score loss — grammar, rhetoric, data analysis, advanced math — with focused Bluebook-aligned practice.
Adaptive Mock Testing
Timed full-length mocks followed by Scan & Strike debriefs. Every correction gets locked in before the next session.
Logic-First Framework™
Every SAT question has a logical core. We train students to isolate it — stripping away complexity and answering from principle, not pattern-matching.
3-Round Scan & Strike™
A systematic timed approach to each module: confident questions first, medium questions next, hardest questions last. Practice timing decisions under realistic conditions.
Bluebook Adaptive Strategy
Understanding the two-module adaptive structure and performing in Module 1 to unlock the high-score Module 2 pathway is a core competitive advantage.
Clear tuition. Personal instruction.
Contact Olivia to discuss your student's goals, schedule, and tutoring options. A paid trial is available before enrollment.
An introductory consultation covers goals and fit. Trial lessons and instructional assessments are paid. The recommended number and frequency of lessons depend on starting score, goals, weaknesses, and time before the test.
Meet your instructor
Olivia Bang holds a Johns Hopkins University B.A. in International Relations and Economics and has more than 17 years of teaching experience, including instruction at Hackers and Ivy Plan in Seoul. Students work directly with Olivia.
1500+ Score Plan?
Start with an introductory conversation about goals and fit. A paid trial allows Olivia to review your work and recommend the next steps.
Live online SAT tutoring
Work directly with Olivia via Zoom from anywhere in the U.S. Lessons focus on the skills and question types your student needs most. Instruction is in English; parent communication is available in English or Korean.
Elite Results.
We serve students across the SGV and North Orange County — in person and online. Click your city for a dedicated page.
1500+ Score Strategy?
Ask about a paid trial. Olivia will review your work during the lesson and recommend a plan based on your goals and timeline.
Serving Diamond Bar · Walnut · Brea · Fullerton · Rowland Heights
SAT Tutor Diamond Bar CA & Online via Zoom | Gangnam Prep | 1500+ Scores
Gangnam Prep is Diamond Bar's elite Digital SAT tutoring program. Founded by Olivia Bang, a Johns Hopkins graduate who trained at Seoul's top academies including Hackers and Ivy Plan. Our proprietary Logic-First Framework and 3-Round Scan & Strike method help students build grammar, reading, and problem-solving skills. We serve Diamond Bar, Walnut, Brea, Fullerton, and Rowland Heights CA.
Digital SAT Tutoring in Diamond Bar CA
Gangnam Prep specializes in Digital SAT prep for high school students in the San Gabriel Valley. Our one on one tutoring program is built entirely around the Bluebook adaptive test format. Study plans target the skills and timing patterns that need attention.
About Olivia Bang SAT Tutor Diamond Bar
Olivia Bang has more than 17 years of teaching experience. She graduated from Johns Hopkins University and trained at Korea's most elite test prep academies. She founded Gangnam Prep in Diamond Bar California to bring Seoul's elite methodology to SGV students.
Online SAT Tutoring via Zoom — Nationwide
Gangnam Prep offers fully online SAT tutoring via Zoom for students across the United States. Online SAT tutor sessions use the same Logic-First Framework as in-person classes. Book your introductory online consultation today.
SAT Tutoring Programs Near Diamond Bar
We offer Digital SAT Intensive programs, SAT Score Boost for plateau students, ACT Prep, AP English tutoring, and College Essay coaching. All programs include a free introductory consultation with no obligation. Sessions available online and in person serving Diamond Bar CA 91765.
Phone: (323) 501-7118. Email: info@gangnamprep.com. Address: Diamond Bar, CA 91765.
Free Resources
Essential Guides for Diamond Bar Students
Frequently Asked Questions
Do you offer online SAT tutoring?
Yes. Gangnam Prep offers fully online Digital SAT tutoring via Zoom, available nationwide. Online students work one-on-one with Olivia Bang using the same Logic-First Framework™ curriculum, Bluebook adaptive mock tests, and structured debriefs as in-person students in Diamond Bar, CA. Every engagement begins with a paid trial lesson.
How much does SAT tutoring cost at Gangnam Prep?
Contact Olivia to discuss your student's goals, schedule, and tutoring options. A paid trial is available before enrollment.
What SAT score improvements can I expect?
Progress varies by student and depends on starting score, practice, learning needs, and preparation time. Individual results vary with starting score, effort, and timeline; the curriculum is calibrated for students targeting 1500+.
What is the Logic-First Framework™?
The Logic-First Framework™ is Gangnam Prep's proprietary Digital SAT methodology. Instead of memorizing answer patterns, students learn to isolate the logical core of each question type and answer from principle. It is paired with the 3-Round Scan & Strike™ pacing method and informed by more than 17 years of teaching experience.
How long does SAT prep take at Gangnam Prep?
The right frequency and duration depend on current scores, goals, skill gaps, practice, and time before the test. Olivia recommends a plan after reviewing your work.