1996g-474 casestudies child childdaycarecenters childdevelopment children childrenwithsocialdisabilities childwelfare curricula curriculumplanning earlychildhoodeducation education education(elementary) education(preschool) educationalequalization family familycharacteristics finance indianchildren languagearts(preschool) nutrition poorchildren poverty preschool psychology research socialclass socialsupport standards unitedstates urban