secondary school students stredoškolskí študenti 12 [vynechat] learners 3 [vynechat] žiaci 3 [vynechat] contests 2 [vynechat] gymnáziá 2 [vynechat] high schools 2 [vynechat] human rights 2 [vynechat] názory a postoje 2 [vynechat] súťaže 2 [vynechat] views and attitudes 2 [vynechat] ľudské práva 2 [vynechat] European integration 1 [vynechat] absolventi škôl 1 [vynechat] communist regime 1 [vynechat] crimes of communism 1 [vynechat] dejepis 1 [vynechat] dejiny školstva 1 [vynechat] democracy 1 [vynechat] demokracia 1 [vynechat] drogy 1 [vynechat] drug use 1 [vynechat] drugs of abuse 1 [vynechat] educational research 1 [vynechat] európska integrácia 1 [vynechat] extremism 1 [vynechat] extrémizmus 1 [vynechat] foreign study 1 [vynechat] healthy lifestyle 1 [vynechat] history 1 [vynechat]