The theme of this study is "Expropriation of Diversity at School: Crossing Pathologization, Medicalization and Teaching Practices". Thus, this research seeks to answer the following question: what are the intersections between teaching practices and the phenomena of pathologization and medicalization at school? It aims to understand the phenomenon of pathologization and medicalization at school and its intersections with teaching practices. Its pertinence comes from elucidating the phenomena of pathologization and medicalization at school, through the identification of some mechanisms that produce them. Just as it was justified by the possibility of understanding the ways in which, medicalization and pathologization, are manifested in the school routine, affecting the students' life and schooling process. Based on Historical-Cultural Psychology, the study was developed based on field research, with a qualitative method, taking place in a municipal public school in the state of Alagoas. For its effectiveness, we used as data collection instruments, the semi-structured interview with 02 students participating in the Multifunctional Resource Room (SRM), as well as with their guardians. We held a focus group meeting, composed of 06 (six) teachers, 02 of which were from SRM. With this group of professors, we also used the individual semi-structured interview. We also worked with the analysis of the following documents: copies of part of the class diary, descriptive opinion of the students participating in the research, parts of the portfolio and a few more documents used by the SRM teachers. The data obtained were analyzed using thematic content analysis. With the analyses, we built three categories: Teachers' perceptions and conceptions about diversity at school; School and teaching practices, student learning and development; Pathologization and medicalization in everyday school life. The categorization process helped us to better interpret and deepen the information in the search for understanding the phenomenon in question. It should be noted that we are in the data interpretation phase.