The Princeton Review PSAT prep course could be your ticket (or, if you’re a parent, your child’s ticket) to a higher score that will set you on the path to entry into your first-choice college.

It also had to include at least 350 participants; it had 626 in the "treatment" group, i.e., the group of students who engaged in The Princeton Review's SAT Prep course. (In total, the study ...