The five counties of Madera, Merced, Contra Costa, San Joaquin and Stanislaus constitute Region 3 of the California Migrant Education Program. A study to evaluate movement patterns of migrant students from, to and within the state was conducted using data from the Migrant Student Record Transfer System. It indicates that in 1977 Region 3 ranked first of the nine California regions in the number of students entering directly from another state. Of the 715 interstate migrant students entering, 74% were elementary school students. Merced, Stanislaus and San Joaquin were the major receiving counties. Region 3 also ranked first as a provider, with 648 students moving from the region to other states. Texas, Arizona and Washington received 86% of those leaving the region. However, intrastate students accounted for the most movement; of the 7,749 migrant students entering Region 3 schools, 94% of them came from other Region 3 schools. Of the 7,797 intrastate migrant student movements 94% were to schools within the region and 82% were within the same county. Over 5,000 students were reported as not having moved at all during the year. When data from 1975, 1976 and 1977 were compared, the percentage of intrastate movements within a given region increased from 88.2% in 1975 to 91.8% in 1977. Tabular data presents state, region and county figures on such information as destinations, origins, numbers and grade levels. Intrastate movement and no movement statistics are also given for 1975, 1976 and 1977. (DS)