This guidebook is designed to assist high schools and 2-year postsecondary institutions in planning, implementing, and operating occupational program articulation efforts. Chapter 1 presents a retrospective of program articulation and a look at program articulation today, including time-shortened programs, advanced skills programs, and other forms of articulation. Chapter 2 provides profiles of 18 articulation study sites (including contact information, purpose, type of articulation, overview, and distinctive features). Chapter 3 takes a close look at 10 articulation principles for practitioners. Examples from the study sites illustrate the principles. Action steps for articulation are listed to help educators apply these principles in their own settings. Chapter 4 examines the basic factors in planning and implementing a successful program and suggests creative ways for avoiding or resolving problems. Chapter 5 examines issues related to but not generally part of secondary-postsecondary articulation, such as sharing of facilities, contracting to deliver courses for another institution, 2-year college/4-year college "2 + 2" arrangements and the like. Chapter 6 summarizes the project findings, draws conclusions, and makes recommendations for future action. Appendices contain a list of the technical panel members, a sample of the interview protocol, samples of articulation agreements, sample curricula for advanced placement and other "2 + 2" programs, and a glossary of terms. (CT)