This paper explores the issue of whether assimilation time has any bearing on the performance of students. Assimilation time is defined as the number of times during the week that a class meets. This study examined whether students would perform better in a 50-minute class that met three days a week versus a 75-minute class that met just two days…

Research Findings: This study investigated the effects of full- and half-day kindergarten programs on classroom instructional quality and children's academic achievement. Considerations were given for how the length of the school day, language status (English language learner [ELL] and non-ELL), and children's attendance patterns influenced…

Quasi-longitudinal data on student achievement, drawn from a computerized file on about 50,000 children, essentially consist of cross-sectional performance data analyzed in terms of length of program exposure while allowing for analysis of post-program performance on the basis of program exposure. The data are also analyzed according to the major…