Commonwealth students’ curiosity is limitless. They stretch their minds with everything from Modernist poetry to number theory, asking why? And how? And what if? Driven by this intellectual passion—and the deep expertise of our college-caliber faculty—our classes nurture critical thinking, creativity, and a love of learning that lasts. 
If you share our enthusiasm for questions and discovery, if you’re keen to learn and to know, you should get to know us.



Uncommon Academics for Uncommonly Curious Students

In a world of ever-shortening attention spans, Commonwealth students and teachers dedicate themselves to deep, purposeful focus. Here you’ll learn to read closely and think with patience and tenacity. You’ll uncover the inner workings of molecules, of medieval history, and of the arts you pursue. You'll tap into Boston's vast scholarly research and experiential learning opportunities. Sharpening your eyes every day will help you see further into everything you encounter, from the Gettysburg Address to theoretical calculus. You may not know what your academic passion is just yet. But by diving into new topics, you will discover your interests. And at Commonwealth, you’ll be able to pursue them with full force.




student-to-faculty ratio


faculty with advanced degrees


median SAT composite score (Class of 2021)


AP scores 3 or above; 75% scores 4 or 5 (Class of 2021)


Exceptional Faculty

Our teachers are experts in their fields; eighty-six percent hold advanced degrees and many have taught at colleges and universities. They were drawn to Commonwealth by the strength and dedication of our students, the small seminar-like classes (often taught at the college level), and the chance to help young scholars go farther than they had imagined.
Yet, it’s their empathetic approach to teaching—a generosity with both their expertise and their time—that sets our faculty apart. Teachers know our students as individuals and spend hours talking about essay drafts, concepts that weren’t clear in class, or projects they’d like to pursue.

Commonwealth has the most amazing teachers. I'm so grateful to anyone who taught me during high school—I learned so much and was so well prepared for college. Having been in an environment with huge class sizes and professors who are more often focused on research than student learning, I can really say what a difference your individual care for students makes." Maya Venkatraman '17


Advising Program

Students meet with their advisors one-on-one, usually weekly, to discuss course work, talk through questions, and plan their courses of study. These close relationships are the foundation of a warm, close-knit community where individuality is cherished.

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College Counseling

Commonwealth’s college counseling program is a well-tuned process tailored to students’ individual needs. Close collaboration among student, parents, and advisor assures that our graduates wind up at colleges as stimulating and challenging as Commonwealth.

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Dive In Commonwealth

Dive In Commonwealth is a tuition-free academic enrichment program for promising, highly motivated middle school students from all over Boston and its surrounding communities. Students who demonstrate readiness for and interest in entering Commonwealth at the end of the program can join the school’s ninth-grade class and are eligible for need-based financial aid to ensure the affordability of a Commonwealth education.