Students at 15 D.C. middle schools have received their first reward checks for good grades and behavior.

On Friday, students earned $137,813 from the Capital Gains program, a new venture between the District and Harvard University. Under it, students are eligible for up to $100 month for attendance, doing homework, good behavior and receiving good grades.

The average award totaled $43, and they were distributed to 3,006 students.

At one participating school, Shaw at Garnet-Patterson Middle School, teachers say they have seen less tardiness from students since the program started. They say noticeable changes in grades will probably take longer.

Capital Gains was created by Harvard economist and researcher Roland Fryer.