International School Of Boston

Celebrating over 60 years of bilingual French-English education, the International School of Boston (ISB) is an independent, non-profit, PK-12, multilingual school located in Cambridge.
As a world-class, accredited academic institution, ISB places the development of the bilingual brain at the heart of its mission.

Quick Stats (2024)

Top Rankings

International School Of Boston ranks among the top 20% of private schools in Massachusetts for:


School Overview

Student Body

Total Students
571 students
Student Body Type
Students by Grade
International School Of Boston Student By Grade

Academics and Faculty

Total Classroom Teachers
93 teachers
Student : Teacher Ratio
National avg.: 13:1
% Faculty w/Advanced Degree
Average Class Size
14 students
List of Courses Offered
Matriculation DataMatric. Data
Classroom Dress Code

Tuition and Acceptance Rate

Admission Deadline
Feb. 15 / rolling
Yearly Tuition Cost
Tuition Notes
Tuition between $26,510 and $46,060
% on Financial Aid
Admissions Director
Lucy Pelham
Admissions Associate
Elisabeth Geffray


Total Sports Offered
4 sports


Total ExtracurricularsTotal Extra-curric.
56 extracurriculars
Club or Organization:
Arabic, Archery, Art, Astronomy, Badminton, Ballet, Basketball, BioBuilder, Botany, Chess, Chorus and Select Singers, Club Philo, Coding, Computer Science, Cooking, Dance, Digital Art, Discover of Music, Eco, Entrepreneurship, Farsi, Fashion Illustration, Fencing, Film, Finance, Girls Who Code, ISB Radio, Jazz / Rock Band, Karate, Legos, Life Art, Mandarin, Marine Biology, Math, Math Games, Math Olympiad, Meteorology, Model United Nations Team, Movie Making, Private Music Instruction, Sailing, Soccer, Social Action, Spanish Conversation & Games, STEM, Storytelling and Creative Writing, Student Ambassadors, Student Council, Swimming, Tennis, Theater Company, Ultimate Frisbee, Watercolors, Weird Science, Yearbook Club, Yoga

School Notes

  • Long known for its excellence in bilingual French and English education, ISB has recently launched new Chinese and Spanish language programs in its Elementary School. ISB 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 thrive at leading universities in the United States, France, and around the world. Offering a rich experience with rigorous programs, ISB prepares its students for a lifetime of learning and service.
  • Priority application deadline is February 15th. There is no fee to apply, and need-based financial aid is available. No French, Chinese or Spanish is required for admission. Check our website for details about our Open Houses!
Source: Verified school update

Frequently Asked Questions

How much does International School Of Boston cost?
International School Of Boston's tuition is approximately $31,560 for private students.
Does International School Of Boston offer a summer program?
Yes, International School Of Boston offers a summer program. Visit their summer school page for more information.
What sports does International School Of Boston offer?
International School Of Boston offers 4 interscholastic sports: Basketball, Fencing, Soccer and Volleyball.
What is International School Of Boston's ranking?
International School Of Boston ranks among the top 20% of private schools in Massachusetts for: Largest student body and Most extracurriculars offered.
When is the application deadline for International School Of Boston?
The application deadline for International School Of Boston is Feb. 15 / rolling (applications are due on Feb. 15 but additional applications are reviewed year-round as space permits ).

School Reviews

  5.00 out of 5  (3 reviews)
Parent of a twelfth grader. We're getting nostalgic already but are so excited for our son who has just been admitted ED to Columbia. Amazingly diverse student body and faculty. Small classes but with a lot of individualized focus on students. Emphasis on student independence which we know will benefit him in NYC next year. I've heard admissions is getting increasingly competitive. We're thankful our son could get it when he did so many years ago!
- Posted by
We've been with ISB for several years now and my daughter is so happy with the program and with her friends. Teachers are amazing, dedicated, well-educated and really care about their students. Love the emphasis on building empathy and valuing the diversity of perspective. She is in middle school now and we plan to stay for the IB program in the upper school.
- Posted by
We've been with ISB for several years now. One child in middle school, the other in upper school. We were previously happy with the school but are even happier now with the recent change in leadership. Our children have thrived at ISB. They come from an English-speaking home, so the opportunity to connect them with another language and with a more globally focused curriculum and internationally diverse student community has been amazing.
- Posted by

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Quick Stats (2024)

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Did You Know?

The average private school tuition in Cambridge, MA is $26,140 for elementary schools (read more about average private school tuition across the country).

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