CATO's analysis of the data coming out about SAT scores.
Shortly thereafter, a few astute folks in the Palmetto state noticed that South Carolina's average rose solely due to a substantial improvement in the performance of private school test-takers, and that the composite scores for public school students actually fell by 5 points.
I find this aspect particularly interesting:
What the data show is quite different. Middle-income South Carolinians score 32 points below middle-income families nationally. Those from families earning less than $20,000 score 72 points below their income peers nationally. And those from families earning over $160,000 score 74 points below their income peers nationally. It is the richest South Carolinians who are the furthest behind their income peers around the nation.