Family economic status is generally considered to be an important factor associated with students' educational outcomes. However, to evaluate the strength of this contention, it is important to first have appropriate measures of family economic status. Measuring the economic status of Vietnamese people has been particularly difficult as the respondents have not been able to report accurately on their income. This has been compounded in rural populations, because of the relative economic homogeneity of communities. This study constructed, calibrated and validated a set of items to form a measure of economic status of students' families in rural Vietnam. (Contains 5 tables and 1 figure.)