Knowledge in its process of appropriation necessitates on the part of the learner, the mobilization of an efficient management strategy of adapted competencies. The present article in its problematic presents the theoretical perspective of Desaunay (1985) which estimates that three fundamental competences (relational, technical and affective) have to be mobilized by a learner. The methodology is the inductive-hypothetical-deductive one. The questionnaire, guided interview and observation were used to collected data from 250 students of Government bilingual high school and College Siddi Djaouro both of Maroua town (Cameroon). The Statistical Package for Social Sciences (SPSS) version 20.0 was used to analyze data. The Chi square test was also use to analyze data inferentially. From the study and the findings obtained, it could be concluded that there is a significant correlation between self-centered management of competences and the appropriateness of knowledge.