Children's learning experiences across the early childhood years (birth to age 8) need to be far better integrated and aligned, particularly between prekindergarten and K-3. Education quality and outcomes would improve substantially if elementary teachers incorporated best preschool's emphases and practices (e.g., attention to the whole child; integrated, meaningful learning; parent engagement) and if preschool teachers made more use of those elementary-grade practices that are valuable for younger children, as well (e.g., robust content, attention to learning progressions in curriculum and teaching).