Does doing homework help to increase test scores? A teacher asked 80 students if they complete their homework on a nightly basis. Forty of the students said yes and forty of the students said no. After collecting the data, it was determined that the students that completed the homework on a nightly basis, on average, had higher overall test grades than students that did not complete homework on a nightly basis. Does this study show that completing homework on a nightly basis helps increase test scores?