What does a student achieve and learn by the time he or she graduates from high school? How are various schools educating and evaluating students in their final year of school? Interdisciplinary senior courses at Phillips Exeter Academy encourage students to exercise their analytical, interpretative, and decision-making skills; to define their own values; and to utilize their logical and rhetorical skills. However, these courses are electives. This paper describes the programs of eight private schools, with a focus on the structure of their senior-year curricula and assessments. The paper also describes a model for modifying the senior-year curriculum, which is developed around a unifying center. Senior-year programs at the following schools are highlighted: Trinity School, Phillips Exeter Academy, Riverdale Country School, Dwight-Englewood School, and Central Park East Secondary Schools (all in New York City, New York); Crossroads School (Los Angeles, California); Peddie School (New Jersey); and Punahou School (Honolulu, Hawaii). Two figures, a glossary, and a guiding definition of portfolios are included. (LMI)