In the following materials, Mplus syntaxes used for analysis and resulting parameter estimates are provided. Files are sorted according to the analytical steps presented in the article: 1. **EFA_EduExpectations**: Exploratory factor analysis of indicators of students’ educational expectations used in Project TALENT 2. **Univariate_SES(EDU)**: Analysis of SES (parents’ educational attainment) compositional school effects without controlling for compositional achievement effects 3. **Univariate_ACH**: Analysis of achievement (mathematics and language) compositional school effects without controlling for compositional SES effects 4. **Multivariate_SES(EDU)+ACH**: Analysis of simultaneous effects of schools’ socioeconomic and achievement compositions 5. **Multivariate_SES(Total)+ACH**: Analysis of simultaneous effects of schools’ socioeconomic and achievement compositions using the combined SES index (parents’ educational attainment, families’ home possessions, and parents’ occupational status) 6. **Mediation_SES(EDU)+ACH_via_EduExpectations**: Analysis of simultaneous school compositional effects on life course outcomes through students' educational expectations