Standard errors for the average percentage of class time that public school kindergarten classes used various instructional approaches, by kindergarten program type: Spring 1999

SOURCE: Walston, J., and West, J. (2004). Full-Day and Half-Day Kindergarten in the United States (NCES 2004-078). Data from U.S. Department of Education, NCES, Early Childhood Longitudinal Study, Kindergarten Class of 1998–99 (ECLS-K), Base Year Public-Use Data File (NCES 2001-029).