01 / Snapshot
What the public record currently says
- Program
- SAT
- Focus
- SAT · AP · TOEFL on-demand courses
- Locations
- Online
- Formats
- On-demand online
- Evidence grade
- V4 · Self-published
- Historical Google snapshot ·
- No reliable public sample recorded
- Evidence Registry
- 3 linked claim records
02 / VSCALE source record
The current grade comes from HagwonScale
HagwonScale's dataset updated 2026-10-01 assigns V4 · Self-published to Master Prep. PrepSignal rechecked the exact academy identity on 2026-10-02 and adopts the grade without independently awarding it.
- Source classification
- V4 자사 공개
- Identity match
- Exact name, program and profile match
- Source evidence summary
- 인강형 SAT 강의 플랫폼
- Source updated
- PrepSignal checked
- Grade history
- V4 → V4 · unchanged
Supports. The source's current public-evidence classification for this academy profile.
Does not establish. Teaching quality, student outcomes, popularity, trust, current staffing or individual fit.
Open the HagwonScale academy profile · Open the source dataset · Read the VSCALE definition
03 / Claim ledger
Claims, sources and limits
Every record below uses the same public fields: source pages, distinct stories, independent audits, claim origin, denominator, period, scope and explicit limits.
Master Prep is listed as a SAT provider serving Online through On-demand online, with a disclosed focus of SAT · AP · TOEFL on-demand courses.
- Source pages
- 3
- Distinct stories
- 3
- Independent audits
- 0
- Claim origin
- PrepSignal editorial record
- Denominator
- One academy profile
- Period
- HagwonScale dataset updated October 1, 2026; identity rechecked October 2, 2026
- Scope
- SAT program, locations and formats
- Campus
- Current branch and course details require confirmation
Supports. The profile identity, program, location, format and disclosed focus.
Does not establish. It does not establish teaching quality, outcomes, staffing, timetable or individual fit.
- PrepSignal · Master Prep public evidence profilePrepSignal open dataset · Story key: prepsignal-academy-master-prep
- PrepSignal · PrepSignal Korea SAT and IB Academy DatasetPrepSignal open dataset · Story key: prepsignal-academy-open-dataset
- HagwonScale · Master Prep VSCALE source profileShared directory source · Story key: hagwonscale-academies-dataset
In the August 10, 2026 directory snapshot, Master Prep carried V4 · Self-published as its public evidence label.
- Source pages
- 2
- Distinct stories
- 2
- Independent audits
- 0
- Claim origin
- PrepSignal editorial record
- Denominator
- One academy profile
- Period
- Historical profile snapshot reviewed August 10, 2026
- Scope
- Historical verification status of public evidence
- Campus
- Organization profile unless a source states a branch
Supports. The dated historical public-evidence classification.
Does not establish. The historical label is not the current source record and is not a teaching-quality, outcome, trust or fit rating.
- PrepSignal · Master Prep public evidence profilePrepSignal open dataset · Story key: prepsignal-academy-master-prep
- PrepSignal · Methodology: verification grades and evidence limitsPrepSignal editorial methodology · Story key: prepsignal-methodology
HagwonScale's October 1, 2026 public dataset assigns V4 · Self-published to Master Prep; PrepSignal adopts the label and does not independently award it.
- Source pages
- 3
- Distinct stories
- 2
- Independent audits
- 0
- Claim origin
- official primary source
- Denominator
- One of 63 academy profiles
- Period
- HagwonScale dataset updated October 1, 2026 and rechecked October 2, 2026
- Scope
- VSCALE verification status of public evidence
- Campus
- Organization profile unless HagwonScale identifies a branch
Supports. The current HagwonScale VSCALE classification and the source's public-evidence summary: 인강형 SAT 강의 플랫폼
Does not establish. The grade is not a teaching-quality, outcome, trust, popularity or individual-fit rating, and PrepSignal has not independently awarded or audited it.
- HagwonScale · Master Prep VSCALE source profileShared directory source · Story key: hagwonscale-academies-dataset
- HagwonScale · HagwonScale academy datasetShared directory source · Story key: hagwonscale-academies-dataset
- HagwonScale · VSCALE verification-grade definitionsShared directory source · Story key: hagwonscale-vscale-method
05 / Fit
When this profile may belong on your shortlist
Master Prep belongs on the interview list for SAT students who need remote access or schedule flexibility and want SAT · AP · TOEFL on-demand courses.
This is a screening conclusion, not an enrollment recommendation. Teacher assignment and timetable fit can outweigh an academy-level signal.
06 / Interview
Seven questions to ask before paying
- Who will teach this student, and will that teacher remain through the course?
- How is the first diagnostic converted into a weekly plan?
- What is the class size for the exact course being offered?
- How often will parents receive progress evidence?
- What denominator and date sit behind each outcome claim?
- How are missed lessons, makeups and time-zone conflicts handled?
- What are the written refund and transfer terms?
07 / FAQ
Direct answers
What is Master Prep?
Master Prep is listed as a SAT education provider serving Online through On-demand online. Its disclosed focus is SAT · AP · TOEFL on-demand courses.
What should families confirm before enrolling at Master Prep?
Confirm the current teacher, class size, weekly timetable, diagnostic process, feedback cadence, fee and refund terms, and the denominator behind any outcome claim.
What do Naver reviews say about Master Prep?
No Korean physical campus was disclosed for a Naver Place match; this profile is listed as online-only or outside Korea.