“…The studies that investigate the role of such a climate for civic education report a positive association between an open classroom climate and more support for human rights, increased civic knowledge, and greater political participation (Campbell, 2008;Torney-Purta & Barber, 2005;Torney-Purta et al, 2001, p. 137;Torney-Purta, Wilkenfeld, & Barber 2008;Zhang, Torney-Purta, & Barber, 2012). For example, Hahn's (1998) study of students in the United States, Denmark, Germany, The Netherlands, and England found that students are more likely to develop attitudes that foster civic participation when they frequently discuss controversial issues, perceive several sides of issues, and feel comfortable expressing their views. Moreover, Campbell (2008) found that, particularly among low socioeconomic students, an open classroom climate has a strong relationship with students' appreciation of political conflict and likelihood of voting.…”