Preschool through Grade 12

Building 3: Main Building - Middle & Upper School

Building 3 : Main Entrance

Historic Building

ISB has been the proud owner of its historic building on the Cambridge Campus since 2005. The building, constructed in 1850 by Gridley Bryant, a famous architect in the “Boston Granite School,” first served as the Cambridge poorhouse and was converted to a parish school twelve years later. ISB acquired and renovated the building in 2005 and is committed to the preservation of this unique building. ISB’s Lower, Middle, and Upper Schools are located in this building.

Middle School

Our classes are taught in French and English, with students functioning at a high academic level in subjects taught in either language. In addition to very challenging academics, the Middle School years are greatly enriched by abundant opportunities to participate in interdisciplinary projects, the Student Exploration Program (SEP), field trips, overnight trips, and Student Council.

Upper School

Upper School students choose between the French Baccalaureate and the International Baccalaureate programs in ninth grade. Depending on the track they choose, student are offered several electives in Latin, art, theater, music, and world history.

College Counseling

The Office of College Counseling works as a team with families. Not only do we focus intensely on our students in their senior year, but we also aim to work with all families in the Upper School, so that each feels prepared when the time comes for their student to submit applications. The counseling process is designed to provide specialized guidance through individual student meetings, group sessions, workshops, and visits from college representatives. We are dedicated, supportive, hands-on, available, and invested in each student and family, as well as committed to representing the ISB community to institutions of higher education worldwide. ISB has a strong record of placing students at respected and competitive institutions.

Media Center

The Media Center, an open space with natural sunlight on the fourth floor, was renovated in 2012 and serves as:

  • a library for students and teachers, with 8,000 books in French, English, German, Spanish, and Mandarin
  • a place of study and research with 20 Chromebooks and 16 laptops
  • an exam center where our students can take National Exams
  • a conference/meeting center where guest speakers inform our community on the school curriculum and provide parenting advice
  • a concert hall for talented musicians performing or accompanying on a Mason & Hamlin grand piano
  • a performance center on special evenings
  • and a calm place to relax in comfortable armchairs with magazines or just gazing at the view


Technology is used to some degree at all levels of our school. We start our formal computer technology program in third grade. In Middle School, Chromebooks are used in classes on a regular basis for research and interactive projects. The Upper School is gradually providing individual iPads where iOS apps supplement teaching in classrooms. Since January 2015, the students have been participating in an online digital citizenship class with The Virtual High School (