Princeton Review has decided to no longer make claims regarding the average test score increase by students taking their prep classes.
Princeton Review made the decision voluntarily but after an investigation by the Better Business Bureau. The investigation was started after Kaplan test prep claimed that Princeton Review had no basis for their claims of test score increases.
I think paid test prep for the SAT and ACT has its place for some students. But the claims that had been made by Princeton Review implied that the average test score increase might apply to all students. Yet a recent study of paid test prep found that the average test score only increased on the SAT score by 30 points.
I applaud Princeton Review for making the decision to eliminate the claims of huge test score increases so that students are not misled about their chances.