Having a morning instead of afternoon math or English class increases a student’s GPA by 0.072 (0.006) and 0.032 (0.006), respectively. A morning math class increases state test scores by an amount equivalent to increasing teacher quality by one-fourth standard deviation or half of the gender gap. Rearranging school schedules can lead to increased academic performance.
That is from a new paper by Nolan G. Pope, who is on the job market this year from the University of Chicago. Here is his overall profile. His job market paper (pdf), with Nathan Petek, suggests that evaluating teachers by multi-dimensional metrics, and not just test scores, can bring big gains to educational quality.