Grades better predictor of college success

From NPR, on a new study looking at college success: "Students actually performed better in college than their SAT and ACT scores might lead an admissions officer to expect. The study has another clear result: High school grades matter — a lot. For both those students who submitted their test results to their colleges and those who did not, high school grades were the best predictor of a student's success in college. And kids who had low or modest test scores, but good high school grades, did better in college than those with good scores but modest grades."