The Early Childhood Longitudinal Study, Kindergarten Class of 2010-11 (ECLS-K:2011) is a longitudinal study that followed a nationally representative sample of students from their kindergarten year to the spring of 2016, when most of the students were in fifth grade. The public-use kindergarten through second-grade data file includes information collected during the fall and spring of the 2010-11 school year (when the students were in kindergarten), the fall and spring of the 2011-12 school year (when most of the students were in first grade), and the fall and spring of the 2012-13 school year (when most of the students were in second grade). 

The study provides information on students’ status at entry to school, their transition into school, and their progression through the elementary grades. The longitudinal nature of the ECLS-K:2011 data enables researchers to study how a wide range of family, school, community, and individual factors are associated with educational, socioemotional, and physical development over time. 

The data, user’s manual, and electronic codebook can be downloaded directly from the ECLS data products page: https://nces.ed.gov/ecls/dataproducts.asp.

For more information about the ECLS-K:2011, please visit https://nces.ed.gov/ecls/kindergarten2011.asp.

The data and documentation are products of the National Center for Education Statistics at the Institute of Education Sciences, part of the U.S. Department of Education.