Hawaii's Health and Education Collaboration Project (HEC) is intended to develop a personnel preparation model that promotes working relationships among trained collaborative providers and keeps families pivotal to the process. This monograph reports on the progress of this family-professional partnership initiative. Following the preface, the first section defines family-centered interprofessional collaboration as diverse health, educational, and social services practitioners working together to improve community-based services for young children and their families. The next section outlines seven principles of this collaboration, several include: recognizing and respecting the knowledge, skills, and experience that families and professionals from all disciplines bring to the relationship; recognizing that negotiation is essential in a collaborative relationship; and bringing to collaborative relationships the mutual commitments of families, professionals, and communities to meet the needs of children and their families. The third section of the monograph details the Health and Education Collaboration Project and the project's primary training and development site, the community-based Healthy and Ready to Learn Center (HRTL) which provides direct services to families with children (prenatal to age 5) who are at environmental risk. The fourth section describes the project's 2-year implementation. The fifth section details the developmental stages of the project and lessons learned: Stage 1--Building a Shared Vision; Stage 2--Staff Development; Stage 3--Training; Stage 4--Evaluation, Feedback, and Refinement; and Stage 5--Dissemination. Seven practice examples included from the HRTL staff reflect the meaning of the principles of family-centered interprofessional collaboration. Following a summary, three appendices outline other demonstration projects funded by the U.S. Maternal and Child Health Bureau, list the members of the National Commission on Leadership in Interprofessional Education (NCLIE), and list HEC Project Advisory Committee Members. Contains 12 references. (SM)