This report contains the field plan and implementation procedures which were utilized for the observational/focused ethnographic component of Head Start's Child and Family Mental Health (CFMH) Evaluation Project. The introductory section of the document provides the reader with an overview of the Head Start program, its mental health goals, the CFMH's demonstration project, and the CFMH evaluation effort. The relationship between the evaluation's quantitative and qualitative components is also discussed, as are the observational approach and its policy and programmatic implications. The next section of the report, the design section, delineates the procedures that were employed in the observational/focused ethnographic component. The acquisition and treatment of data are presented in the section that follows. (Existing provisions for storage and retrieval, quality control, and analysis are described.) The final section describes the field implementation of the ethnography, including the selection of personnel, the ethnographers' training program and their entry into the field, and a summary of the observational/focused ethnographic activities conducted in the field. Child and teacher observation agendas, the page codes, master index, and files used, the key to the index numerical code, a sample of the data reliability check, and a copy of the focused ethnographer training program, are appended. (Author/MP)