This report describes research on in-school career development and its consequences for youths' work experiences in the first few years beyond high school graduation. Chapter 1 discusses career development and describes the general framework for the longitudinal study. Chapter 2 describes project design and sample characteristics. Chapter 3 overviews the data organized around these variable groupings: demographic and background characteristics, skills and knowledges, planning and plans (including values), and activities of adolescents and young adults. The final section details analysis issues. Chapter 4 describes the development of six scales indexing and organizing dimensions of pre- and extra-occupational manifest interests. In Chapter 5 six scales indexing and organizing dimensions of occupational values, work routines, and job returns/rewards are described. Chapter 6 examines stability of interests over high school years and whether these interests effect educational outcomes in high school and work values. Chapter 7 addresses the planning process (career decision making) during adolescence; chapter 8 explores content of those plans. In chapter 9 patterns of employment in secondary school and routes to employment are discussed. Chapter 10 and 11 study the routines and rewards aspects of youths' employment experiences during early postsecondary years. Chapter 12 discusses results. Data tables are appended. (YLB)