As Colorado continues to thrive, attracting new businesses and young professionals, the state must prioritize strategies to attract, retain, and support a strong early childhood workforce for children birth through age eight -- both for the state's growing economy and for the growing and increasingly diverse population of young children. Building on the accomplishments of Colorado's 2010 plan to support the early childhood workforce, Colorado's Early Childhood Workforce 2020 Plan (EC Workforce 2020 Plan) provides an ambitious roadmap for a comprehensive professional development system designed to achieve these priorities over the next three years. (author abstract)