In recent years, a new movement to raise awareness about early math learning has been growing in the U.S., driven by research showing that foundational math knowledge is more predictive of later success in school than nearly any other indicator, including literacy. This awareness of the importance of early math has led to an increasing focus among…

The Early Childhood Longitudinal Study, Kindergarten Class of 2010-11 (ECLS-K:2011), is collecting information about the early educational experiences of a nationally representative sample of children who were in kindergarten or who were of kindergarten age in ungraded classrooms or schools in the 2010-11 school year. The data collection began in…

Young children experience various types of early care and education environments the year before they enter kindergarten. Some children attend center-based arrangements such as preschools, childcare centers, or Head Start programs, while others are cared for in relatives' or nonrelatives' homes or are normally cared for only by their parents.…