International civic and citizenship education study : assessment framework / Wolfram Schulz ... [et al.]Initial finds from the IEA international civic and citizenship education study / Wolfram Schulz ... [et al.]ICCS 2009 international report: civic knowledge, attitudes, and engagement among lower-secondary students in 38 countries / Wolfram Schulz ... [et al. ; ed. by Paula Wagemaker Editorial Services]ICCS 2009 Asian report : civic knowledge and attitudes among lower-secondary students in five Asian countries / Julian Fraillon, Wolfram Schulz, John AinleyICCS 2009 encyclopedia : approaches to civic and citizenship education around the world / ed. by John Ainley, Wolfram Schulz, Tim FriedmanPreparing for life in a digital age : the IEA international computer and information literacy study : international report / Julian Fraillon, John Ainley, Wolfram Schulz, Tim Friedman, Eveline Gebhardt