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Early Childhood Longitudinal Study, Kindergarten Class of 1998‑99 (ECLS‑K)


The ECLS-K provides information critical to informing policies that can respond sensitively and creatively to diverse learning environments. In addition, the ECLS-K enables researchers to study how a wide range of family, school, community, and child characteristics are associated with early success in school and later development and academic performance. The longitudinal nature of the studies enables researchers to study children's achievement and growth in reading and mathematics knowledge and skills, as well as knowledge of the physical and social worlds in which they live. It also permits researchers to relate trajectories of growth and change to variations in children's school experiences in kindergarten and the early grades.