Has anyone seen 0% improvement (or score decline) after extensive prep course?

<p>“SAT Coaching Found to Boost Scores – Barely”
[SAT</a> Coaching Found to Boost Scores – Barely - WSJ.com](<a href=“SAT Coaching Found to Boost Scores -- Barely - WSJ”>SAT Coaching Found to Boost Scores -- Barely - WSJ)</p>