Not at all, it is not necessary to purchase all the models of the same level. Our training is student-centered, which involves helping you overcome your weaknesses and hone your strengths. For this reason, we give the possibility of buying only the preparatory exams that are desired . When a student presents difficulties in a specific aspect, whether oral or written, we put all the means at his disposal. In this way, you can work on those areas that you need to develop the most and progressively raise your level.