This study compared the academic and social development of students who entered grade 1 very early (5:6 years or 5:7 years), in the mid range (5:8 to 6:3 years), and very late (6:4 years or older). The purpose of the study was to explore the hypothesis that the early grade 1 entrants would have continuing problems in both academic and social…

The Class of 1979 project is a longitudinal study of the consequences and implications of variability in school readiness at the age children enter school. The study followed the development of 129 children since 1979, the year in which they entered Kindergarten. Phase one and two of the research covered the years between 1979 and 1991. Phase…