This report provides a first look at selected findings from the first follow-up of the High School Longitudinal Study of 2009 (HSLS:09). HSLS:09 focuses on understanding students' trajectories from the beginning of high school into higher education and the workforce. The core research questions for the study explore secondary to postsecondary transition plans and the evolution of those plans; the paths into and out of science, technology, engineering, and mathematics fields of study and careers; and the educational and social experiences that are related to these shifts in plans or paths. This "First Look" introduces new data from the "High School Longitudinal Study of 2009" collected in the spring of 2012 when most sample members were in their 11th-grade year. The analyses examine students' educational expectations; students' math performance on an algebra assessment, including gains since the 9th grade; students' math and science efficacy; and students' initial planning for postsecondary educational application and enrollment. Appended are: (1) Technical Notes and Methodology; and (2) Standard Error Tables. (Contains 21 tables and 2 footnotes.)