This document outlines Alive & Thrive's process for developing large-scale nutrition strategies through social and behavior change. It discusses: - Recent results showing rapid, large-scale improvements in behaviors like exclusive breastfeeding and complementary feeding. - An 8-step implementation framework for scaling behavior change, including identifying priority behaviors, influential groups, and a mix of activities. - Criteria for selecting priority behaviors like impact and feasibility. - The importance of developing program materials and contents that align with the strategic decisions around priority behaviors, drivers of change, and influential groups. - Tools like creative briefs and content checklists to help translate the strategy into effective programs and ensure alignment.