The report provides Indian and Migrant Program Division managers and specialists in each of the 5 Head Start component areas with a comprehensive picture of the 43 home base learning centers operating between October 1978 and May 1979, with a total enrollment of 3,108 migrant children. Using data collected from the Head Start and center directors, the staff responsible for service delivery in each program component, and the parents, this Phase I report presents detailed, component-specific information on program activities, interactions between program staff and users, and special problems which arise in the areas of education, health, nutrition, social services, and parent involvement. Specifically, the report (1) describes the organizational structure and the administrative and support functions of the 6 grantees which run the 43 home base programs; (2) provides profiles of the service delivery systems operating at the home base sites--program design, staff characteristics, resource inputs and service outputs of each program component; (3) provides profiles of the children and families using home base programs--demographic characteristics, mobility, previous exposure to Head Start programs, use of other social service programs, contacts and interactions with current programs; and (4) develops measures of special needs of program users and program efforts to meet these needs. (CM)