Object exploration is considered a driver of motor, cognitive, and social development. However, little is known about how early childhood education and care settings facilitate object exploration. This study examined if children's exploration of objects during free play was facilitated by the use of particular spatial components (floor, tables,…

In 2014-2015 and 2015-2016, a metropolitan school system in the southern United States embarked on a unique mission to improve the quality of its public prekindergarten programs through a partnership with a group of developmental researchers in an iterative, data-based venture. Data on 407 children in Year 1 and 433 in Year 2 (who were enrolled in…

This study examined associations between peers' expressive language abilities and children's development of receptive and expressive language among 1,812 four-year olds enrolled in 453 classrooms in 11 states that provide large-scale public pre-kindergarten (pre-k) programs. Higher peer expressive language abilities were positively associated with…

Examined effects of cooperation on role taking and moral reasoning in 120 fifth-grade students. Classrooms using cooperative peer-initiated group learning were compared with other innovative and more traditional teacher-centered methods. Role taking was found to be enhanced by cooperative interdependence, but moral reasoning level was not…

Reports data on several measures for 160 low income black ninth- and tenth-graders who participated for one year in Bereiter-Engelmann, DARCEE, Montessori, or traditional prekindergarten. Discusses possible relationships between techniques used in different preschool programs and sex differences in achievement level and IQ. (Author/CB)