The DEC Recommended Practices were developed to provide guidance to practitioners and families about the most effective ways to improve the learning outcomes and promote the development of young children, birth through age 5, who have or are at-risk for developmental delays or disabilities. To support implementation of these evidence-based practices, tools and resources were developed and organized around eight topics (e.g., family, environment, assessment). The tools, which include performance checklists, practice guides, and professional development guidance materials, are available in English and Spanish, and in multiple formats.