“…The conceptual and methodological frame of reference of the paper is based on ideas of the following authors: philosophy of science (Rozov, 2006(Rozov, , 2009; philosophy and theory of development (Marietta, 1995;SalÓte, 1998SalÓte, , 2002Laszlo, 1995Laszlo, , 2007Laszlo, , 2008Laszlo, , 2009Laszlo, , 2012; understanding of values (Young, 1949;Kluckholm, 1962;Rokeach, 1972;Schwartz, 1994;⁄wita˘a, 2015;Minkov & Hofstede, 2012); values education (Meyer, 1976;Harland & Pickering, 2010;⁄wita˘a, 2012;Nov•Ëek, 2013); education for sustainability and sustainable education (SalÓte, 1998;McNernen & Davis, 1996;Sterling, 2012); action research as a research method (OíBrien, 1998;SalÓte, 2002;Holland & Mulcahy, 2007).…”