Stop Guessing: Five Step Diagnostic to Choose an SAT Tutor for Parents The fastest, most reliable path to meaningful SAT improvement is a diagnostic-led, personalized 1:1 tutor who builds a plan around your student’s actual weaknesses and uses official College Board practice materials. Won Prep follows exactly this model, starting every engagement with a comprehensive diagnostic assessment. When you choose an SAT tutor, prioritize one thing above credentials or price: proof they can show you diagnostic data, a tailored roadmap, and a way to track measurable progress. TL;DR: A diagnostic-led, personalized approach that identifies whether errors come from content gaps, timing issues, or carelessness significantly improves SAT score growth. Tutors must be able to demonstrate how they diagnose error types, use official current practice materials, and tailor weekly plans based on actual diagnostic data. Large score improvements typically require three to six months of focused, diagnostic-driven prep, with measurable progress tracked through error reduction and section score trends. When screening tutors, prioritize those who can explain their diagnostic process, provide documented outco