The period of adolescence is marked by difficulties, objections, conflicts. It is also the period of looking for self-expression, in which changes in teenager’s psychical, inward and emotional world are observed. The cognition of the world becomes essential. The world outlook is being formed. Besides, the attitude towards other people is developing and changing. The teenagers become more active. They experience the needs of communication with contemporaries. On the other hand, the reality of today’s school shows something else. In spite of the fact, that many researchers, who made some studies on the situation of school, claim that there is a special space for spread of some social parts and interaction at the lessons of physical education (Crum, 1996); boys and girls practice separately at those lessons. The separation starts when teenagers are 12 – 14 years-old. It happens at the time when the necessity to communicate and understand each other becomes specific. This is the principal attitude of the authors of this work. It also shows that the problem of sexual education needs theoretical and empirical argumentation. Our research partially has the aim to solve this problem. The objective is - to test and estimate the standpoint of teenagers, who are educated together and separately, to the role of coeducation for their physical-social conditions. The goals of the research: to test and estimate the standpoint of teenagers, who are educated together, to the role of... [to full text]