This summary highlights SSI perception data. Perception surveys were developed by NCHEMS to measure the impact of SSI on the attitudes, perceptions, and beliefs of students, teachers, parents, guidance counselors, and businesspeople with regard to the importance of rigorous course-taking in high school and its effect on postsecondary and occupational outcomes. These perception surveys were conducted between September 24, 2007, and January 31, 2008, in eight states at 43 different SSI events.