Central objective: Mixed-age — focused guidance for early childhood education and child care centers on supervising, transitions, and engaging families across mixed‑age groups. Supporting elements include related resources and tools—Guiding Questions for Active Supervision & Safety; Early Childhood Transitions; Partnering with Families; Creating the CDA Portfolio; and Family Engagement & School Readiness—with direct links to full materials (note: formal trainings and articles are currently unavailable).