These incentives include smaller class size, shorter class teaching time, a stipend in addition to the salary, an opportunity to choose the next school of assignment and advantages for the promotion to administrative positions preferred as the final stage of the teaching career (Kang and Hong, 2008). However, at the same time, it can have unintended consequences widening the gap between students from different socio-economic backgrounds. Particularly, disadvantaged students may not have parental guidance and support to do homework, a quiet place to study at home and time allocated to after-school learning due to family and other responsibilities (OECD, 2014a, 2016a). Schools can therefore work with parents to encourage their involvement with children at home and help parents to better support their children with school work.