Early childhood education is a field within education encompassing the knowledge base related to children from birth through age eight (third grade). Early childhood is a unique time in the development of a child, during which much learning takes place (Centre for Environment and Sustainability, 2009). Approaches to teaching young children cover a wide spectrum ranging from direct instruction to emergent curricula. This entry provides a brief historical background of early childhood education, discusses its roots in child psychology, summarizes outside impacts on the field, and describes its main curricular models.