With few students interested in higher education, and due to the necessity to complete daily chores, homework was discouraged not only by parents, but also by school districts.
No research has ever been conducted to determine whether this claim has any merit.
Homework can cause tension and conflict in the home as well as at school, and can reduce students' family and leisure time.
In the Cheung & Leung-Ngai (1992) survey, failure to complete homework and low grades where homework was a contributing factor was correlated with greater conflict; some students have reported teachers and parents frequently criticizing their work.
Homework also provides an opportunity for parents to participate in their children's education.
Homework is designed to reinforce what students have already learned.