This text investigates sensitive issues in school historical knowledge, through the analysis of didactic narratives (texts and images), in school history books, approved by the National Textbook Program, in the 2018 Notice, in use in Brazilian schools. For this purpose, didactic narratives about the 1964 Military Coup and its political and social consequences in Brazil are selected, based on the analysis of three didactic collections: History, Global History and History Workshop, aimed at High School, with the aim of focus on problematizing the historicity of this theme in materials for school use. Concepts from the field of historiography such as Narrative, Memory, Forgetting and History are mobilized in understanding the construction of didactic narrative and the field of education, dialogue is held with the perspective of the history of curricula and school subjects to understand the purposes educational issues, social disputes, around the shaping of school history.