How online affinity networks expand learning and opportunity for young people Boyband One Direction fanfiction writers, gamers who solve math problems together, Harry Potter fans who knit for a cause. Across subcultures and geographies, young fans have found each other and formed community online, learning from one another along the way. From these and other in-depth case studies of online affinity networks, Affinity Online considers how young people have found new opportunities for expanded learning in the digital age. These cases reveal the shared characteristics and unique cultures and practices of different online affinity networks, and how they support “connected learning”—learning that brings together youth interests, social activity, and accomplishment in civic, academic, and career relevant arenas.