The Boston Public Schools Department of Early Childhood commissioned a needs assessment of current kindergarten (K2) and preschool (K1) programs [1] to inform the BPS Department of Early Childhood about professional development needs to improve the quality of existing K1 and K2 programs, and [2] to inform the Department of additional classroom resources necessary to expand the K1 program to provide universal access for Boston 4 year olds to accredited, full day programs.