In the present project it has been possible to prove the relationship existing between internal personality variables such as self-concept or pro-sociality and distal variables like physical activity and academic achievement, within the school context. Promoting physical activity both as a sport and also a means for teenagers to learn personal and social competence allows us to offer an educational tool to develop pro-social behavior. This is a descriptive project, whose sample is made up of 115 secondary school students. A socio-demographic questionnaire has been used, the self-concept questionnaire(AF-5), the scale of pro-sociality in teenagers and adults, the Cantoblanco scale of socialization difficulties(SOC) and different school qualifications. Among the results obtained, it is confirmed that by doing physical activity ones physical self-concept improves and this, in turn, leads to better social perception thus integrating the teenager into peer groups and resulting in better academic results.