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.