This document discusses the potential of mobile learning in Africa. It notes that while mobile learning has focused on technology, it has failed to leverage the social aspects of mobile devices. Context is created through social interaction. The document presents a scenario where a veterinarian in Tanzania uses a mobile knowledge exchange network to share videos and audio recordings with assistants to help farmers identify and monitor diseases. It suggests bringing together mobile infrastructure, social software, and data collection tools to support knowledge construction through socially-embedded mobile learning activities.