This article is based on data from two national research projects in Norway dealing with upper secondary educational reforms that began in 1994. Together, the research projects represent a longitudinal study of prospective life course data from 1995 to 2003, covering approximately 500 students from the time they were receiving special education in upper secondary school to the age of 22. The analysis is based on theories of social networks, frame factors, risk and resilience, and life course transitions. It uses a typology of social marginalization based on the dimensions of network density and network size to capture the differences in framing opportunities and restrictions on the students' social network relationships in the spare time arena. The study addresses how such relationships in early adult life are affected by earlier school experiences, such as whether they attended special or mainstream classes, compared with personal factors and their family situation at the start of upper secondary school. (Contains 5 tables, 3 figures, and 7 footnotes.)