International School of Boston


The International School of Boston (ISB) is an independent, non-profit, French-English bilingual and international school, and one of the oldest, most respected bilingual schools in the United States. Located in Cambridge, one of the most vibrant metropolitan areas in the U.S., this world-class accredited academic institution places the development of the bilingual brain at the heart of its mission. Offering a rich experience with rigorous programs and featuring a wide range of both local and international students and faculty, ISB prepares its students for a lifetime of learning and service.

Whether students join us in Maternelle, Lower, Middle or Upper School, ISB graduates stand apart from other day schools' graduates, because their knowledge of the world is enhanced by learning across the disciplines in multiple languages and by connecting with diverse classmates from more than 40 countries. 

Our youngest learners (Toute Petite Section, starting at age 2 - grade 1) spend much of the day in the French language. Students in grades 2-5 spend time in both English and French. Middle School students have à la carte French or English options by subject. Our oldest students, grades 9-12, can choose a curriculum that is English- or French-based. These students graduate with an American high school diploma and choose between two internationally renowned diplomas, the French or the International Baccalaureate, giving them the opportunity to succeed at leading universities in the United States, France, and around the world.

One of the many beneficial programs offered at ISB is the ISB Internship Program, enabling Upper School students to spend time in a real work environment. They also have the opportunity to study for up to a trimester at a partner school abroad. Our younger students take advantage of all that the Greater Boston area has to offer in terms of culture, arts, and history through experiential learning programs. ISB also has a very strong athletic program that includes its Blue Terriers Varsity Interscholastic soccer, basketball, volleyball and fencing teams.

We invite you to sign up for our Virtual Open Houses at

Additional Information

Beginning Grade Taught Preschool

Final Grade Taught 12th Grade

Foreign Languages Taught French, English, Spanish, German and Chinese

Religious Affiliation Non Denominational

Number of students enrolled 530

Student Teacher Ratio 6:1

Annual Tuition Price Range $21,200-$37,300

Offers financial aid Yes


45 Matignon Rd
Cambridge, Massachusetts 02140
United States

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Fax: 617.499.1454

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1 Review

We have three kids at ISB, all of them started in the Maternelle (pre-school). We don't speak French at home but value multilingualism as a life skill. All our children picked up French faster than we could have imagined. The Maternelle is very relaxed and play-based but with a lot of structure in the background that provides valuable insight into your child's progress. Our eldest is about to start Middle School and is picking up German as a third school language. Great community and excellent school experience.

March 2018

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