Using data extracted from the Migrant Student Record Transfer System, a study was undertaken to (1) define the flow of migrant children to and from the state month by month, (2) determine the principal movement patterns, and (3) examine intrastate movement and its patterns. For trend analysis, data were compared for the calendar years of 1975, 1976 and 1977. In 1977 there were over 82,000 migrant students identified in the state. The vast majority were intrastate students. During the year, there were 2,753 interstate student entries; 2,622 interstate student departures; and 35,353 intrastate student movements. Texas continued to be the most dominant sending and receiving state, followed by Arizona, Washington and Oregon. Migrant students moved infrequently within the state, averaging 1.4 moves per child. Over 90% of the intrastate movement was intraregional and 85% of the moves within a region did not cross a county line. This state summary makes extensive use of charts to present study data on numbers, origins, and destinations of migrants, with breakdowns by month and grade level. Other charts compare statistics from the years of 1975, 1976 and 1977. Maps show regional organization and monthly entry patterns and departures. Appended are three large maps giving detailed patterns of departures, entries and intrastate movement. (DS)