In this study, a comprehensive educational effectiveness model is tested in relation to student's civic knowledge. Multilevel analysis was applied on the dataset of the IEA Civic Education Study (CIVED; Torney-Purta, Lehmann, Oswald, & Schulz, 2001), which was conducted among junior secondary-school students (age 14), their schools, and their teachers. In total, 28 countries, 4,136 classrooms, and 93,565 students were included in the analysis. The results indicated that the influences on students' civic knowledge are multilevel. Students' civic knowledge and skills were partially explained by individual characteristics, by factors related to quality and opportunities for civic learning offered by classrooms and class composition, and by factors at the national context level. We conclude that most effectiveness factors are relevant for the field of civic and citizenship education and that schooling and educational policy matter for students' success in this field. (Contains 1 note, 2 tables, and 1 figure.)