Educational research presents numerous findings today on how to build a qualified school for all. This paper recognizes the importance of the social origins of the students, educational management, evaluation, curricular organization etc. However, if focuses on selected features related to the differences among and within schools, on the basis of the national and international literature. Considering that the peculiar structure of the educational systems is similar to an onion, with its successive peels, this work analyses factors affecting learning, such as expenditure, facilities and equipment, time, teachers, school climate and management, peer effects, enrollment procedures, space management, student grouping, and other factors that affect effectively in the classroom. Therefore, it is possible to shape such a school, particularly in developing countries, where its impact is stronger than in developed countries.
Sociology of education; Economics of education; Sociology of the school; Educational democratization; Teachers; Adolescent society; School climate; School management
