This manual provides guidance and documentation for users of the longitudinal kindergarten-second grade (K-2) data file of the Early Childhood Longitudinal Study, Kindergarten Class of 2010-11 (ECLS-K:2011). It mainly provides information specific to the second-grade rounds of data collection. Users should refer to the "Early Childhood…

This manual provides guidance and documentation for users of the longitudinal kindergarten-fourth grade (K-4) public-use data file of the Early Childhood Longitudinal Study, Kindergarten Class of 2010-11 (ECLS-K:2011), which includes the first release of the public version of the third-grade data. This manual mainly provides information specific…

This report summarizes analyses of 2007-2008 Austin Independent School District students' academic performance on the state-mandated test to their performance on a fitness assessment.

Data from nearly 30,000 pregnant and third decade (20-29 years) mothers show that small infant size among teenage mothers is consistent with the mother's size and not directly related to early age at conception. Third decade mothers of comparable size give birth to infants with essentially the same characteristics and problems. (Author/GC)

It should now be recognized that every child has at least five parallel ages: A "chronological" age, in years, months, and days: a "physiological" age, indicative of physical growth and maturity; a "mental" age, significant of intellectual capacity and ability; a "school standing," or "pedagogical"…