This research is focused on History education in the class model known as 6° ano Carioca [Rio de Janeiro 6th Year], implemented by the Rio de Janeiro mayor s office in 2011, also known at the time as Projeto 6° ano Experimental [Experimental 6th Year Project]. This public policy directed towards 6th year classes defends an interdisciplinary approach to content and extends generalist teachers work from the Elementary School to the Secondary School. Unlike regular 6th year, where there s a specialist teacher per subject, in the 6° ano Carioca a single teacher becomes responsible for five subjects per class: Science, Geography, History, Math and Portuguese. Considering its duration and consistent expansion in participant schools, this dissertation intends to understand the organization of the 6° ano Carioca system, to analyze this public policy based on teacher perception, and to present generalist teachers strategies to lecture on History content. The qualitative research s methodology was based on semi-structured interviews and document analysis. Contradicting the claim of better educational quality during the Eduardo Paes administration (2009-2016), the study verifies, as consequences of the policy, precarious education, strongly marked by subject hierarchy at the expense of Human Sciences, low investment in continued education for teachers, constrained space for interdisciplinarity discussion and planning, teacher deprofessionalization recrudescence and low performance shown by students from this class model throughout their educational trajectory.