title: Play in pre-school centers--II. Effects on play of the child's social class and of the educational orientation of the centre.
mesh_terms: D002675:Child, Preschool; D003071:Cognition; D004777:Environment; D005260:Female; D006801:Humans; D007092:Imagination; D007804:Language Development; D008297:Male; D010988:Play and Playthings; D012578:Schools, Nursery; D012923:Social Class; D013663:Teaching / Q000379:methods*; D014705:Verbal Behavior