Follow-up studies are necessary for investigating the long-term, enduring, anticipated effects of bilingual education. Investigations need to be based on a recognition of their value to educational audiences, the relative merits of research issues, attention to the problem of attrition, proper selection of dependent measures, and the merits of planned follow-up studies. In addressing the need for follow-up studies, this report discusses (1) options or areas of focus for conducting follow-up investigations, (2) follow-up research foci, (3) methodological issues affecting the use of follow-up designs, (4) statistical and analytic issues in conducting follow-up designs, (5) selection of follow-up variables: measurement issues, (6) large scale post hoc follow-up studies, and (7) focused follow-up studies of bilingual education consequences for students. Charts include (1) a typology of follow-up and related designs; (2) potential research areas to investigate dealing with long term consequences of bilingual education on students, long term development of teachers, and long term program implementation and institutionalization; (3) an overall analysis of effectiveness of techniques; and (4) a flow chart of the process by which necessary sample size may be determined. (JK)