https://www.fcd-us.org/pk-3-an-aligned-and-coordinated-approach-to-education-for-children-3-to-8-years-old/
This Social Policy Report summarizes the research basis for the PreK-3rd approach. Authors Kimber Bogard and Past President Ruby Takanishi review the findings regarding the timing and dosage of early educational experiences, program quality, and teacher preparation and compensation. Published by the Society for Research in Child Development, the report also summarizes the developmental basis for PreK-3rd.