This program analysis is part of the interim report on the National Home Start Evaluation. Home Start, a federally-funded 3-year (1972-1975) home-based demonstration program for low-income families with 3- to 5-year-old children was designed to enhance a mother's skills in dealing with her own children and to provide comprehensive social-emotional, health and nutritional services. One focus of the report is the examination of selected program-wide implementation features that seem especially important for future use in planning and operating home-based alternatives to Head Start. The first chapter of the report serves as an executive summary of the most important findings of the report. Other chapters include information on methodology; data collection and analysis and on the three major Home Start program dimensions: Home Start families and staff; the program, and services to families. (Author/MS)