Civic life online : learning how digital media can engage youth - Bennett; Alan Schussman; Jennifer Earl; Kathryn C. Montgomery; Kirsten A. Foot; Michael Xenos; Bers, Marina Umaschi; Earl, Jennifer; Foot, Kirsten A.; Levine, Peter; Montgomery, Kathryn C.; Raynes-Goldie, Kate; et al. (Cambridge MIT Press, 2007)