The general aim of this study is to investigate the teaching of Sociology in secondary schools at the Federal Institute of Education, Science and Technology of Paraiba (IFPB) - Sousa Campus, using interdisciplinarity as a category of analysis. The specific objectives of the research were: (i) to present how the subject is structured in the pedagogical projects of the institution in question, (ii) to explain what the subject's syllabus says, (iii) to analyse the teaching plans and class diaries of the Sociology teacher and (iv) to reflect on the existence, or not, of an interdisciplinary practice of Sociology content. As a methodological proposal, bibliographical and documentary research was carried out, using a case study procedure based on triangulating the analysis of the Pedagogical Course Projects (PPC's), the subject's teaching plans and the Sociology teacher's diaries, the latter referring to the 2015 academic year. The research was based on the theoretical framework presented in the works of Fazenda (2011), Japiassu (1976), Paviani (2008), Morin (2000), Candido (2006), Ianni (2011), Miceli (1989), among others.