^# Rounds to zero.

NOTE: The federal poverty-level status composite variable is derived from household income and the total number of household members at each administration of the survey and is used to define households below the poverty level. For instance, in 1998, if a household contained four members and the annual household income was lower than $16,655, then the household was considered to be below poverty. Poverty status, kindergarten through spring 2004, and school type, kindergarten through spring 2004 are composite variables that are derived from five rounds of the survey (fall 1998, spring 1999, spring 2000, spring 2002, and spring 2004).

SOURCE: U.S. Department of Education, National Center for Education Statistics, Early Childhood Longitudinal Study, Kindergarten Class of 1998–99 (ECLS-K), Longitudinal Kindergarten–Third Grade Public-Use Data File, and Fifth-Grade Restricted-Use Data File.