RESUMO
The present study was conducted with the aim of investigating the effect of family function and university and classroom environments on students' academic achievement. The research method is descriptive survey. The statistical population includes all students of the technical and vocational college of Mazandaran province in the academic year of 2018-2019. The statistical sample of research includes 321 students who were selected using cluster random sampling method and were evaluated by Family Assessment Device (FAD), classroom and university environment questionnaire and grade point average. The data analysis was performed using LISREL ver.8 and SPSS ver.20 software. The findings of the research show that family function, the university and classroom environments have a significant effect on the academic achievement of students, so that, the effect of family function is 0.75, and the effect of university and classroom environments is 0.43. Also, considering the correlation coefficient level of P<0.05, the relationship between all components of family function, classroom and university environments and students' academic achievement is significant.