The study looked into how school partnership generates benefit. It aimed to identify the structures of partnership among collaborating schools and to examine elements that can contribute to sustainable eLearning development. Six cluster project cases were purposefully selected from an e-Learning pilot scheme in Hong Kong to investigate how school partnership functions in e-Learning implementation through semi-structured focus group interviews. The findings identified five types of partnership structures that were adopted by the six e-Learning cluster projects, namely, a traditional leader-centered team leadership; a fusion of traditional leader-centered and distributed team leadership; a distributed-coordinated team leadership; an intermediate form of distributed-coordinated and distributed-fragmented team leadership; and a duplicated distributed team leadership structure. Elements including mutual benefit, active school engagement with dynamic communication and interaction, reasonable team size, and co-building of online sharing platform for channeling ideas and actions efficiently are critical to keep e-Learning school partnership sustainable. Copyright © 2019 National Taiwan Normal University.