stredné školy 19 [vynechat] základné školy 18 [vynechat] extrémizmus 13 [vynechat] secondary schools 11 [vynechat] elementary schools 10 [vynechat] extremism 9 [vynechat] learners 8 [vynechat] názory a postoje 8 [vynechat] žiaci 8 [vynechat] views and attitudes 5 [vynechat] drogy 4 [vynechat] terorizmus 4 [vynechat] terrorism 4 [vynechat] šikanovanie 4 [vynechat] detská agresivita 3 [vynechat] mládež 3 [vynechat] parents 3 [vynechat] rasizmus 3 [vynechat] rodičia 3 [vynechat] scientific research 3 [vynechat] vedecký výskum 3 [vynechat] bullying 2 [vynechat] deti a mládež 2 [vynechat] drugs 2 [vynechat] násilie v škole 2 [vynechat] pedagógovia 2 [vynechat] racism 2 [vynechat] voľný čas 2 [vynechat] aggressiveness in children 1 [vynechat] alcoholism 1 [vynechat]