and 4, adding a grade level each year through the elementary school. ISB completed construction of a detached sports facility in 2017, complete with two pressurized domes with advanced air filtration, providing pollution-free indoor tennis courts and a playing field area. Campus ISB is situated on a campus in Shunyi district, approximately 30 minutes from downtown Beijing and close to expatriate residential compounds. Two purpose-built sports domes sit side by side over 8,500 square meters. The sport domes have H-14 grade filtration systems. In addition, ISB has four fully equipped gymnasiums (one with a climbing wall); baseball and softball diamonds; two full-sized turf soccer fields; a rugby pitch, running track and 665-seat stadium and an aquatics center with a 25-meter pool and diving boards. In the main school building are 12 science labs, a student cooking lab, a visual arts wing in the middle and high school, and art studios in elementary school. The performing arts wing consists of a 600-seat theater, Black Box theater, rehearsal space, and studio stage. The main school building also has two library-media centers with more than 82,000 volumes and over 160 magazine subscriptions. ISB supports a one-to-one MacBook laptop program for each student in grades 2 through 12. In 2020 the ISB opened four new facilities: an early years learning center, an elementary school arts and theater, middle and high school performing arts center, and a middle and high school art and design center. Organization ISB is a non-profit school governed by a 12-member Board of Trustees. These 12 volunteers are responsible for setting and approving school policy, overseeing ISB's financial status, recruiting, supporting and evaluating the Head of School and guiding strategic direction of the school, and sets goals to fulfill its responsibilities and establishes standing committees to manage its work. The majority of ISB's income (95%) comes from tuition and capital fees, with bus fees, interest income and grants making up the remainder. Student and teacher body As of the 2021–22 school year, ISB had 1,710 students originating from more than 50 countries and 35 nationalities. There are 723, 435, 447 students in elementary school, middle school, and high school, respectively. ISB is not permitted to take Mainland Chinese students without foreign passports because it is a "school for foreign personnel". There is high turnover in the study body since many students have parents reassigned by their employers from Beijing to other