Background: Shalom Schwartz defined the core values “as desirable, trans-situational goals, varying in importances that serve as guiding principles in people’s lives”. The value types proposed by Schwartz were: power, achievement, he-donism, stimulation, self-direction, universalism, benevo-lence, conformity, tradition and security. This study de-signed to determine values preferences in students of Te-hran city.
Methods: This is a descriptive study. The sample size con-sists of 1000 students that educating in Tehran high schools. We used clustering method for sampling. Each student was given Schwartz value survey
Results: the value ranking in sample was Conformity, secu-rity, Self-direction, universalism, benevolence, achievement, hedonism, power, stimulation, tradition. The highest rela-tion was between Schwartz and self-enhancement (r=0.88) and Schwartz and openness to change
Discussion: The Conformity, the first value in the ranking introduces the life-adjustment as the most important chal-lenge among adolescent population. In the other words adolescence is the time in which we face a big change in hormones level and physiologic status.
Keywords: Values System, boys, girls, Students, Iran