This report summarizes the achievement information provided by state educational agencies for the Migrant Education Program, 1985-86. Of the 34 states submitting achievement information for the regular term, 29 used norm-referenced tests, 10 used criterion-referenced tests, and 3 used locally developed instruments. Of the 15 states submitting achievement information for the summer term, 6 used norm-referenced tests, 8 used criterion-referenced tests, and 6 used locally developed instruments. All states that submitted data tested reading and mathematics; 17 tested language arts. Several factors preclude a precise national estimate of the achievement of migrant education participants: (1) the variety of test types and range of test measures used; (2) under-testing of currently migrant students because of their mobility and language deficits; (3) incompatibility of standardized testing with the short-term basis of many migrant projects or the cyclical patterns of migrant movement; and (4) the inadequacy of reading and mathematics tests as measures of the impact of highly diversified programs. Individual sections for the District of Columbia, Puerto Rico, and all states except Hawaii describe the services delivered to migrant students, and, where applicable, provide information on achievement testing and tables of test results. Appendices describe the methodology used, and summarize data by grade and by grade-span for migrant students in those states that use a norm-referenced model of achievement gain and express regular term achievement results in normal curve equivalent scores. This report contains 81 data tables. (SV)