Introducing identity / David Buckingham -- Imaging, keyboarding, and posting identities : young people and new media technologies / Sandra Weber and Claudia Mitchell -- Consumer citizens online : structure, agency, and gender in online participation / Rebekah Willett -- Questioning the generational divide : technological exoticism and adult construction of online youth identity / Susan C. Herring -- Producing sites, exploring identities : youth online authorship / Susannah Stern -- Why youth (heart) social network sites : the changing place of digital media in teenage social life / Danah Boyd -- Mobile identity : youth, identity and mobile communication media / Gitte Stald -- Leisure is hard work : digital practices and future competences / Kirsten Drotner -- Mixing the digital, social and cultural : learning, identity and agency in youth participation / Shelley Goldman, Meghan McDermott, and Angela Booker.