This document discusses scaling collaborations to improve population health. It provides an agenda for a workshop on the topic, including framing the issue using Doug Engelbart's concept of Networked Improvement Communities. It then outlines two key efforts - the CDC's 6|18 Initiative and the 100 Million Healthier Lives Movement. The document discusses key elements of spreading and scaling up initiatives, providing examples from the field. It poses questions to prompt discussion around interesting ideas and activating whole-of-nation efforts through local action.