the book contains practical details for providing high-quality experiences in early childhood programs that promote the learning and development of three-and four-year-old children. This initiative was undertaken as a public service to the State of Texas. The formal learning system is a continuum from birth to preschool to primary school to secondary education to higher education to college graduation and beyond. Each step depends on the successful completion of the prior step in order to prepare a child to meet the challenges of advancement. Inadequate preparation often leaves a child stuck in a learning and development level that too often obstructs their forward progress through the remaining continuum. Although all steps in the continuum deserve our attention and resources, the penalty is harshest on children who from birth to age five have not been adequately prepared to enter kindergarten and maximize the opportunity.The motivation of Susan Landry and the team assembled for this book project was to harvest the knowledge that has been gained from the sciences of brain development, human development, and early childhood education and development and then translate that knowledge into usable guidelines for organized programs for three-and four-year-old children. The guidelines are firmly grounded in science. Three hundred twenty-two references, organized by chapter, are given in the back of the book.The objective is to provide the opportunity for every child in Texas to become optimally ready to learn by entry to kindergarten, and thus, to build a solid foundation on which to continue to achieve success in the education continuum.The ultimate long-term goal of this education initiative is to enhance the knowledge base, skill levels, and capacities of all residents of Texas. Achievement of this goal will provide a highly capable workforce, promote economic vitality, and contribute to better health and sense of well-being statewide. Although the book has been prepared with concern for children in Texas, we hope that early childhood education and development initiatives in other states also will find it useful.