The document discusses the challenges of secondary education in the 21st century. It argues that secondary education must develop strategies to implement ideals of quality education through relevance, effectiveness, efficiency, and educational justice. This includes generating alternative models of organization and administration to transform school environments and structures. The goal is to promote equality and quality so that no one is excluded from schooling. The main topics that need to be addressed to improve secondary education quality are expansion and diversity with justice; analyzing student trajectories and curriculum flexibility; revising the high school's role in knowledge and society; institutional configuration and administration models; institutional climate and sensitivity; and infrastructure and resources. The objective should be to create a true learning community that capitalizes on diversity and transforms flexibility