A conventional diagnostic tells you what your child got wrong. The Reta Razão Structural Diagnostic tells you why — and how the error was produced.
We apply FMEA — Failure Mode and Effects Analysis, a methodology originally developed in engineering to identify how and why systems fail. Each question your child answers — across every section of the exam — is individually classified by format, reasoning type, difficulty level, and execution process. Where the student answered incorrectly, we analyze the specific answer chosen to understand the mechanism that produced the error.
The result is not a score report. It is a structural map of how your child thinks — across mathematics, reading, and writing — where their strengths are, where errors originate, and which specific patterns account for lost points.
Most SAT and IB preparation begins with content review: the tutor covers topics, assigns practice, and adjusts based on what seems to be working. The student’s actual error patterns are discovered gradually — through trial and error over weeks or months.
The diagnostic-first approach reverses this. Before any instruction begins, the structural diagnostic maps the student’s cognitive profile across every assessed section. Every session from day one targets the specific patterns that actually cost points.
- Practice test → score by section
- “You need to improve in algebra”
- Generic content review for weeks
- Tutor discovers patterns by trial and error
- Same curriculum for different students
- Progress measured by overall score
- Every question classified across multiple dimensions
- “Your errors originate in translation, not calculation”
- Targeted intervention from the first session
- Error mechanisms identified before instruction begins
- Program designed for each student’s specific profile
- Progress measured by error pattern elimination
The following case illustrates what the structural diagnostic produces when applied across the complete SAT. A conventional assessment would report a composite score and a list of topics to review. The diagnostic revealed something far more specific — and far more actionable.
When we analyzed this student’s 154 questions across all three sections (Math, Reading, and Writing & Language), what emerged was not three separate problem areas, but a single underlying pattern that manifests differently in each section.
This discovery has a direct practical consequence: interventions that build precision in one section transfer to the others. The habit of checking whether an answer is the best rather than merely reasonable improves performance across Math, Reading, and Writing simultaneously. A conventional approach — treating each section as an independent problem — would never detect this.
| Section | How the pattern manifests | What the intervention targets |
|---|---|---|
| Math | Translates a real-world scenario into a “close enough” equation, then solves the wrong equation correctly | Scratch-work protocol for modeling questions — forcing the translation step to become visible and checkable |
| Reading | Projects her own interpretation onto the text instead of adopting the author’s perspective | Pre-answer protocol: What is this passage doing? Whose perspective does the question ask about? |
| Writing | Selects a word or phrase that is close in meaning but not the precise match for tone and context | Elimination discipline: remove the “close” options systematically before choosing the best remaining match |
Additionally, the diagnostic identified a small, isolated grammar gap — two easy-level pronoun agreement errors in Writing — that requires only targeted review, not a shift in approach. These are concrete, learnable rules that can be addressed in days and yield immediate score gains.
The structural diagnostic is available for the SAT (all sections: Math, Reading, and Writing & Language) and for the International Baccalaureate programme. For IB students, the diagnostic is adapted to the criterion-based assessment system — identifying which assessment criteria are consistently underperforming, what type of assessment triggers the most errors, and how these patterns connect to predicted grades.
The diagnostic produces two documents: a Parent Report that translates every finding into clear, practical language with concrete recommendations and estimated timelines; and a Technical Report containing the full quantitative analysis — all metrics, all matrices, all error classifications. Both are delivered in full transparency.
The structural diagnostic is designed to function both as a standalone deliverable and as the foundation of a full preparation program.
Whether or not you proceed with the program, the diagnostic report is yours. It contains enough precision to guide any tutor or educator working with your child — even outside of Reta Razão.