During adolescence, adaptation takes on particular importance because it is the period in which some notions of the self are formed. Furthermore, the transformations that occur in her will have a significant impact on the different aspects of her physical, emotional and social life. The purpose of this research was to understand the manifestations of behavioral adaptation and school performance in a group of adolescents aged 12 to 14 years from a private school. This research was carried out in a non-experimental and descriptive manner, with a group of 70 participants, 46 in eighth grade and 24 in ninth grade, selected through non-probabilistic sampling. The Behavioral Adaptation Inventory was implemented, which was reviewed in Madrid in 2004. The data collected was analyzed through frequencies and percentages, considering the elements of behavioral adaptation, in addition to sociodemographic factors of the sample such as gender. and type of family. The research findings indicated that higher levels of behavioral adaptation and school performance were not detected in ninth grade students compared to eighth grade students. Most of the participants achieved a medium degree of behavioral adaptability and their school performance was between good and average.
