The early care and education (ECE) sector in New Hampshire (NH) is a complex ecosystem that must account for families' needs and resources, the capacity and availability of the workforce, and the costs of providing services. This ecosystem is also bolstered (and constrained) by local, state, and federal policy. This series of primers, titled the "Granite Guide to Early Childhood," synthesizes the widely disaggregated scholarship on child care in New Hampshire and compiles this work into an unprecedented accessible collection. These primers aim to provide a vital understanding of key factors involved in developing a high-quality, affordable, and equitable ECE system.