The Relationship between Homework Time and Academic Performance among K-12: A Systematic Review

Homework is a common activity among K-12 students, and numerous observational meta-analyses have confirmed the positive relationship between homework and academic performance. However, considering children's limited energy and attention, several researchers have proposed an optimum time to spend on homework. This Campbell review examines the effects of homework on academic performance among K-12 students with experimental studies and estimates the optimum time that should be spent on it.