As the Foundation approached its 50th anniversary this year, it asked The Bridgespan Group to assist in taking stock of what Packard can learn from its many collaborations. When it comes to the structure of collaborations, Bridgespan has identified five main models: knowledge exchange, coordination of funding, coinvesting in an existing entity, creating a new entity, and funding the funder. As with all taxonomies, these five categories are meant to serve as signposts along a continuum. Each collaboration differs in a variety of ways, whether it is the flow of funds, decision making, expectations and roles of funding partners, or legal structure. Bridgespan focused on Packard's collaborations that require alignment and more intensive coordination by program staff. Six case studies provide an in-depth look inside examples of all four types of collaboration that venture beyond exchanging knowledge.