The Head Start Measures Project was a 3-year study to develop a set of measures designed specifically for Head Start children. The measures are based on a path-referenced approach to assessment, in which children's performance is described in terms of their position along paths of development. A path is defined as a sequence of skills within a content area that is ordered by difficulty. A path-referenced test score not only indicates what the child has achieved but also details the skills the child is likely to master as developmental progress continues. The result of the project is the Head Start Measures Battery (HSMB), consisting of six scales: Language, Math, Nature and Science, Perception, Reading, and Social Development. There are versions for Spanish-speaking and English-speaking children. In a brief and nontechnical fashion, this report summarizes aspects of the project described in more detail in other publications. Chapter I describes the background of the Head Start Measures Project and the path-referenced approach to assessment. Chapter II describes the HSMB, the 1982-83 field test results, and the uses of the measures. Chapter III describes the development and evaluation process, the psychometric properties of the measures, and the results of research relating program characteristics to achievement. Chapter IV describes a current pilot project, which involves the dissemination of the measures and their use by a sample of 30 Head Start programs. (CB)