Educational motivation plays an important role in classroom learning. But a careful research in this field has not been done yet in Iran. In this research, we try to study the relations among different factors like individual, family, social, and school with educational motivation. The research sample included 1015 persons (445 girls & 570 boys) of high school students in Mazandaran province. In this research the participants were selected by combination sampling (simple & cluster) and completed two questionnaires one of which was Noviki-Streakland and the other was made by the researchers. The collected data were analyzed using SPSS. Pearson correlation coefficient and regression analysis were carried out. The research results reveal positive significant correlations between student’s motivation and individual factors, institutional factors, and social factors. Social- economic status of student’s families, however, did not show any significant correlations with motivations; while other family factors were found to be important. We can conclude that the student learning motivation is not a purely internal and psychological phenomenon but is much related to external factors such as social, institutional, and individual factors.