“…Childcare, in particular, is a unique setting in which children establish formative relationships with both peers and adults (Howes & James, 2002). Past research has consistently shown that toddlers and preschoolers who have had experience with peers in childcare and children who have been more engaged with their peers in childcare are more co‐operative, more prosocial, and more positive in their peer play during the preschool years (Campbell et al., 2000; Clarke‐Stewart, Gruber, & Fitzgerald, 1994; Farver & Branstetter, 1994; Field, Masi, Goldstein, Perry, & Pearl, 1988; Galluzzo, Matheson, Moore, & Howes, 1990; Harper & Huie, 1985; Holmberg, 1980; Howes & Phillipsen, 1998; Lamb et al., 1988; NICHD Early Child Care Research Network [ECCRN], 2001; Volling & Feagans, 1995). A recent, large‐scale longitudinal study of the effects of preschool experience on development conducted with 3,000 British children between the ages of three and seven from a variety of ethnic and socioeconomic backgrounds confirms the findings from past research (Sammons et al., 2003).…”