Purpose: To examine the impact of oral disorders, socioenvironmental factors and subjective perceptions on children's school performance. Materials and Methods: The sample of 515 12-year-old children was randomly selected by conglomerate analysis. The children were clinically evaluated (DMFT index, bleeding on probing and DAI index) and asked to complete the questionnaire about family environment, self-perception of health status, oral health-related quality of life (OHRQoL) and school (questions in Child Perceptions Questionnaire - CPQ11-14). A questionnaire about socioeconomic status and perceptions about their children's health was sent to the parents. School performance was measured. Results: In a multivariate logistic model, the following variables remained statistically significant when associated with adolescents' poor school performance in the final model: number of people living in household, household overcrowding, parental perceptions about their children's oral health, presence of carious lesions and a question from CPQ11-14 about difficulty in paying attention in class because of their teeth, lips, jaws or mouth. Conclusion: The results of this study showed that socioenvironmental factors, subjective perceptions and oral health status of children - particularly carious lesions, have an important impact on school performance, demonstrating the need for planning public health dentistry based on intersectoral public policies. Schlagwörter: oral health, school performance, socioenvironmental conditions