This article offers a summarized view of how the work of Peter Seixas has contributed specific aspects in the curricular transformation project of the subject of Social and Civic Studies, as it refers to the teaching of history in El Salvador. This paper presents Seixas’ general contribution to the rethinking of history teaching in general from a curricular perspective as well as its conceptual insights into historical thinking. In addition, the context of the contributions to the reflection on the concepts of first and second order, and how different authors have delineated the discussion of the historical thinking approach for the promotion of citizenship, i.e., historical consciousness, is placed. Concrete examples on how El Salvador’s ongoing curricular transformation has benefited from Seixas' invaluable contribution.