This chapter illustrates the potential for using speculative assemblage methods as both research and pedagogical practice, in order to build connections between networked learning and learning for sustainability through the fostering of socioenvironmental literacies. We give a rationale for a focus on waste, and marine litter in particular, as an important sustainability and environmental challenge that can be productively explored through learning networks. We then describe the framework that underpins the Waste Stories project, which combines speculative and assemblage methods to create distributed learning networks aimed at reconfiguring relationships of waste and value. We then describe an example of a networked assemblage of waste imaginaries generated by students in a Further Education context in Scotland. These animated imaginaries reveal important dynamics characterising emergent understandings of marine litter in the local and global environment. They also illustrate how content and context can animate a learning network, reminding us that the purpose of networking components into an assemblage is to allow learning to emerge about something.