This paper examines the determinants of learning achievements in Cambodian primary schools. Both student factors and family factors are evaluated. The student factors consist of student age, enrollment age, frequency of homework completion, and number of questions to ask in class. The family factors include the father's educational background, domestic assets, and the student's commute time to school. The school factors are confirmed to influence the learning achievements, but the results are unclear as to what school factors have a concrete influence.