Since the school is part of the Jesuit network that consists of 61 high schools and 28 colleges and universities in the United States, SLUH provides an education infused with the
tradition and philosophy of
St. Ignatius of Loyola. Theology and philosophy classes are conducted daily. According to figures released on SLUH's website in 2011, the median
ACT score for SLUH students is over 30. By composite score, it ranks among the top 7% of schools in the United States. Over 50% of SLUH's class of 2011 achieved a score of 30 or higher on the ACT. Among St. Louis and St. Louis area high schools with a total enrollment of over 600, it had the highest scores in 2012. Since 2005 a total of 31 students have received a 36, the highest score possible. Four members of the class of 2012 achieved this score, along with five members of the class of 2013, and two members of the class of 2014. More recently, seven students from the class of 2024 achieved this score. In 2010, 23 students from SLUH were named
National Merit Scholarship Program Semifinalists, more than any other school in Missouri. In 2011, 17 students were named Semifinalists, while 28 were named National Merit Commended Scholars. In 2012, 25 students were named Semifinalists, while 29 were named Commended Scholars.
Advanced Placement (AP) courses have been offered through SLUH for half a century. AP courses are now offered for 22 disciplines. In 2010, 345 students took 790 AP exams. Eighty-seven percent scored a 3, 4 or 5, grades that qualify them for college credit. In 2012, one of Missouri's ten semifinalists was from SLUH. The
humanities are emphasized in SLUH's curriculum. The language department has offered four-year programs in
Russian and
Chinese since 1964. In 1997, a student exchange program with the
Nanjing Foreign Language School was established. Since 2011, SLUH has sponsored a Confucius Classroom which is a subdivision of
Webster University's
Confucius Institute. In 1999, educational exchange programs for the study of Russian language and culture were established with
schools in
St. Petersburg. In keeping with its strong
Jesuit Catholic heritage, courses in
Latin and
Greek are offered, as are the popular choices of
French,
Spanish, Arabic, and Chinese. SLUH also has strong programs in the natural sciences, mathematics, computer science, social sciences, fine arts, and literature. Virtually all SLUH students immediately enter
colleges or
universities upon graduation. Members of the Class of 2011 were accepted at 203 colleges and universities and attended 72 of them. These students accepted more than 300 scholarships totaling nearly $2 million. In
The Washington Post's 2015 ranking of America's Most Challenging High Schools, SLUH was ranked among the top three in Missouri and the top 1.5% nationwide. In the Post's 2016 ranking, SLUH was ranked among the top 1.2% nationwide. The
United States Department of Education's
National Blue Ribbon Schools Program recognized SLUH as an Exemplary High Performing National Blue Ribbon School for 2015. In 2016,
Niche ranked SLUH as the 19th-best All-Boys high school in the US. ==Facilities==