Research has repeatedly highlighted the important influence of parental socialization styles on children's psychosocial adjustment. However, previous studies about their effects on school adjustment have traditionally addressed a limited set of indicators, such as academic achievement or self-concept, which should be broadened in order to increase our level of knowledge about this topic. Thus, the aim of the present study was to analyze the relationships between parenting styles and other relevant school adjustment criteria (self-regulated learning and academic stress) in adolescence. The study participants were 437 Spanish adolescents (44.7% men) from 12 to 18 years old ( = 14.55, = 1.80) who were enrolled in high school. A multivariate factorial design (parenting × sex × educational level) was used for each set of criteria. The results are consistent with previous research, showing that the indulgent style was related to better school adjustment during adolescence, evaluated through self-regulated learning and academic stress, thus increasing the available evidence about the influence of parenting styles in this setting. Additionally, this relationship remains invariant with regard to sex and the educational level of the participants in the study. Therefore, this study highlights the importance of parenting practices related to high acceptance/involvement for the adequate school adjustment of Spanish adolescents.