Using data from the Quebec Longitudinal Study of Child Development (QLSCD, see the box entitled QLSCD 1998-2010 in brief), this study
replicated and extended the Duncan et al. model by investigating the impact of children’s cognitive, behavioural and motor skills in kindergarten
on their overall success level in fourth grade, including their achievement in mathematics, reading, writing, and science. We also examined how
school readiness in kindergarten contributes to students’ school and classroom engagement in the fourth grade.