The author used the concepts of academic intensity and sense of responsibility to examine whether children with low school readiness may be moderated by the amount of exposure to learning activities and the attitudes that teachers hold toward these children. Analysis of the Early Childhood Longitudinal Study-Kindergarten Cohort revealed that children who experienced high levels of teachers' academic intensity and sense of responsibility displayed greater achievement growth than did their peers who did not receive this support. Furthermore, teachers' sense of responsibility moderated the association between school readiness and mathematics learning growth over the course of elementary school years, which contributed in reducing the learning growth gap engendered given low school readiness. Based on these findings the present study suggests a need for continuous support during the schooling years, as well as before the start of school, to compensate for a lower skill level at school entry.