Job sharing is defined as "two people sharing the responsibilities of one full-time position with salary and benefits prorated"; the concept focuses on positions usually offered only as full-time jobs, often in professional and managerial categories. This book is a guide for teachers and administrators on the implementation and use of job sharing in school districts. The first three chapters of the handbook introduce the concept of job sharing, provide two views of job sharing by administrators who have had job-sharing teachers in their districts, and includes experiences drawn from studies in Framington (Massachusetts), San Francisco Bay Area, Hawaii, and California. Chapters four and five explain why and how job sharing works in the schools, including information on why teachers share, starting the program, designing a partnership, the role of the principal, and benefits and rights. The last chapter evaluates the experience of job sharing, analyzing its costs, impact on education, and reactions of parents, administrators, and teachers' unions and associations. Appendixes include methodology of the New Ways to Work study, job sharing practices in twenty-two California school districts, a job sharing proposal, California Assembly Bill 3339, sample evaluation forms, and a list of New Ways to Work job sharing publications. (KC)