Children who start strong will be more likely to obtain better outcomes when they grow older. This is particularly true for children from disadvantaged socio-economic backgrounds, because they have often fewer opportunities to develop these abilities in their home-learning environments (OECD, 2017(4]). Despite these general trends, significant differences exist across OECD countries in the quality of ECEC services provided to young children, in the types of ECEC services available and in the usual number of hours per week that each child is enrolled.