Without paradigms, the reality will remain outside of the mental representation. The reality is known to the mental because of its transformation in sentences that have a purpose. The cristalisation of the educational ideal in educational purposes, is made by specifing the competences that students must have at the end of an instruction period. For an efficent formation of general educational competences, specific and derivative, it is necessary to be created an personalized curricular model, different, by levels of complexity and difficulty, thus it can be achieved the “differencied personalities”, and offer to those who are studying the possibility to choose without doubt the pathways of their own knowledge and formation.