This handbook is intended to assist policy boards and Interagency Coordinating Councils in developing and writing clear guidelines for implementing Part H of the Individuals with Disabilities Education Act which mandates early intervention services to infants and toddlers with disabilities. Principles are rooted in a "family systems" model of intervention which stresses respecting family autonomy, a collaborative mode of intervention, and a broad definition of "family." The first component of the guide describes the historical context of the law and the nature of the study of ethics. The next component is devoted to background information about the effectiveness of particular intervention strategies with different clienteles. A major section on ethical issues is divided into three sub-sections titled : "Child Centered,""Family Centered," and "Profession Centered." Because decision making often involves conflicts in values or assumptions, one component of the handbook deals with "Value Conflicts in a Group" with sections on "Change of Views" and "Problems of Self-Interest." The final component describes a set of procedures that are then applied to a scenario in which problems are identified, value conflicts are made salient, and solutions proposed. An annotated bibliography of 84 items and sample forms are appended. (DB)