摘要:School achievement is under a multiple factorial context related to student, school and family (SSF). Based on 23.141 Brazilians self-reports, obtained from PISA 2015, representative SSF measures were selected, and their impacts measured on school performance scores in mathematics, reading and science. The feeling of belonging to the school (BELONG) and parents’ emotional support (EMOSUPS) were strongly correlated with the three investigated performances. EMOSUPS affected how the student feels at school and when being assessed. And the educational and cultural resources of the home affected EEC three dimensions, increasing EMOSUPS, BELONG and school performance, and decreasing anxiety during assessments. Thus, the importance of the school and family environments on students’ performance is reiterated and calls for public policies in education that considers the three dimensions.