Early childhood learning sets the stage for growth and development across the life course. Some of children's earliest learning experiences take place in the home environment. The Parents Promoting Early Learning (PPEL) studies are longitudinal, multi-method investigations that examine how the home learning environment supports early childhood learning. Both the toddler and preschool-aged studies include observations of parent-child interactions, parent interviews and time diaries, and direct assessment of parents' and children's language, math, and behavioral skills. Through these studies, we hope to better understand how characteristics of children's daily lives and family activities in the home relate to early learning from ages 2-5.