The school is located on 20 acres (8.1 ha) in the middle of St. Louis's South County suburbs. It is small for a school of its kind, with only around 90 students from grades 7 through 12, about a quarter of whom are international students. Boarding students and day students attend in about equal numbers. TJ is focused on
the classics, and the ideal of a classical education in general, balanced by a strong math program (all students continue through
calculus) and
Advanced Placement courses in science and history for all students. The
Greek program, in particular, is among the best in the nation. Classes, all in the morning, are discussion-oriented and relatively short, at 35 minutes. Students spend the remainder of the day studying independently, engaged in athletics and other extracurriculars, or consulting privately with faculty members, some of whom live on campus. Supervisory staff includes seven resident assistants. As ranked by the Boarding School Review, the median
SAT scores of seniors are among the highest in the nation for boarding schools: 710 reading, 670 math, 690 writing. A large share of its alumni go on to attend
liberal arts colleges. The school has long held membership in the
National Association of Independent Schools, the
Association of Boarding Schools, and
Midwest Boarding Schools, and in 1997 it gained full accreditation by the
Independent Schools Association of the Central States. ==School history==