Students generally pursue a traditional four-year course of study at Seattle Prep and then pursue other arrangements. A wide variety of extracurricular activities are offered at Seattle Prep including Film Club, Chess Team, Mock Trial, Dance Team, Yearbook, Newspaper, ASB, Global Justice Coalition, and Drama Club. Prep also has various social justice clubs including: Global Justice Coalition, Feminist Interest Group, One Voice, Asian Pacific Islanders Club, Black Student Union and LatinX Club. Admissions are based on grades, extracurricular activities, an entrance exam, reference letters, and essays, among other criteria.
Seattle Prep has a 4-year requirement of various community service. The four year Magis Christian Service Program at Seattle Prep exposes students to many different forms of service including service to family, to school, to the poor and marginalized, and to leadership for justice.
Physical structure
In the 1950s, McDonnell Hall was added to the existing Adelphia Hall, and in the 1960s, Peyton Hall was added across the parking lot from McDonnell and Adelphia Halls. The McHugh Gymnasium was built in front of Adelphia Hall and opened in 1983, a result of the school's first major fundraising campaign. Funds from this campaign were used to remodel the third floor of Adelphia Hall for improved science facilities. During this time the library, which then became known as Loyola Library, was moved to Peyton Hall. There were several major additions to Seattle Prep in the late 1990s. A new underground parking garage was built to replace the old parking lot, which was replaced by a grass quad. In addition, St. Ignatius Hall was erected across from Peyton and McDonnell Halls. In 2007, the PACCAR Commons were completed, including new office space with reception desks and also a sick room. Also construction was completed on the Thomas Healy, S.J., Theater and Classrooms. This was the first major renovation since the addition of St. Ignatius Hall. The theater, which also accommodates school Masses, features an orchestra pit with hydraulics moving it up and down for various uses, including the transportation of heavy equipment. The workout rooms and locker rooms were also altered in this remodel. The space below the theater is used for arts classes, a sacristy, and weight/workout rooms. In 2008, sections of pathway around the campus plaza were redone and electronic doors were installed on several major entrances.
Seattle Prep has won numerous league and state titles in many different men's and women's sports. As of 2010, by size Prep is a high-end 1A class school, but plays up in 3A classification. The girls' soccer team are back-to-back state champions and have four other appearances in the state championship game. The girls basketball team qualified for State 14 years in a row, winning it all in 2002. Prep's volleyball team won three straight state titles from 2001–03, and returned to the champions circle in 2010. The boys' basketball team won state titles in 2000 and 2006 and narrowly missed another title in 2012 losing in the state championship game. The team has qualified for State 6 of the last 7 seasons. Prep boy's cross country team won the title in 1966, 1972, and 2000. Prep's boy's cross country teams have finished as one of the top five 3A teams every year but one from 1996-2013. During that span, Prep never placed lower than second in the Metro League. In 2006, Prep won its first women's Metro League team title. The Mock Trial program boasts one national championship and twelve state titles in the last fourteen years. Prep has placed in the top-10 at the National High School Mock Trial Championship eight times during that span. Its 3rd-place finish in 2009 was the best in program history, until the program won the national title in 2014. The Prep Chess Team has played in the Washington High School State Team Championship in each of the past 17 years. Its highest finishes were 2nd, 3rd, 5th, and 6th. In 1999, they also won the Metro Championship.
