This study offers a theoretical reflection on curriculum in the schooling process, based on three texts by renowned authors in the area; Joseph Schwab, José Augusto Pacheco and Michael Young. As a basis for discussion, it brings their writings on curriculum, " Un enfoque práctico como lenguaje para el currículum " by Schwab, (1992); "Curriculum studies: what is the field today?" by Pacheco (2012) and "Curriculum: knowledge and evaluation" by Young (2013). It discusses the main topics covered each author on the subject, and points out ways of analyzing it, understanding that this is a specific field of tensions, disputes, and interests.