The purpose of the study consists in theoretical substantiation and experimental verification of forms and methods of senior pupils` leadership skills formation. Experimental study was conducted in Kazan (Republic of Tatarstan) schools; pupils of 10 th grade in number of 157 took part in the research. In our research, we used several methods and tests: “Diagnosis of leadership skills” (E. Zharikov, E. Krushelnitskiy) – for assessing the level of leadership skills formation; “Self-assessment of leadership skills” (A. Umanskiy) - for identifying the leadership skills; “Diagnosis of communicative and organizational abilities” - for assessing communicative and organizational abilities. The formative experiment confirmed hypothesis based on the assumption that senior pupils` leadership skills formation will be effective when using program “You are the leader”. The research results showed a positive dynamics in levels of leadership skills formation. Thus, the program “You are the leader” is effective due to senior pupils` leadership skills formation. That data is confirmed by mathematical processing and, in particular, the Student`s t – criterion.