This part of the multimethod Head Start bilingual/bicultural curriculum evaluation (Juarez and Associates 1979), provides a description of the procedures followed to ensure and maintain the quality of ethnographic data over time. Data collection procedures, including ethnographic notes, time and event samples, implementation forms, phone call updates and data analysis are discussed. Data quality control procedures such as field manual development, monitoring field notes, providing feedback to researchers, central processing, parallel observation, mid year reviews and final reviews are described. A brief description of the data collection plan and the rationale for the plan are also provided. The preliminary field manual, field note rating and implementation forms are appended. (Author/RH)