Home

Uncommon Community

Uncommon Curiosity

Uncommon Opportunity

Commonwealth is a co-ed independent day school welcoming curious, highly motivated students in grades 9–12. Our close-knit community thrives on making meaningful intellectual and personal connections, while tapping into the opportunities surrounding our home in Boston’s Back Bay.

Meet Faculty and Students

It’s incredible to be part of a community that is this close. I know it's a little bit cliché, but it's just a really cool feeling to be able to turn the corner and see someone and immediately gravitate to them and talk about whatever. There's never, never a dull day. 

Aadi ’26

There are so many different kinds of people at this school with so many different outlooks in life. Even if you disagree with someone's views, I feel like here you can still have a respectful conversation. And I think that's a really important life skill: to be able to talk to people you don't necessarily see eye-to-eye with.    

Iris '27

Commonwealth has opened up a path to relationships with both students and teachers that I hadn't really seen before. I have teachers that I can rely on, that I can ask questions of and meet with, and I want to continue having those relationships in the future with my professors in college and bosses at jobs. Commonwealth really built a strong foundation for that.

Tomi ’27

Melissa Glenn Haber teaching

Really exciting classrooms are where the student is part of the circuit and the electricity is jumping between them and the sources and the teacher. At the beginning of the Enlightenment unit, instead of saying, 'This is what the Enlightenment is.' We say, 'Here's Newton's laws of natural philosophy. Here's a poem about sinful bees. Here’s a little Montesquieu with a little Benjamin Franklin and a little Smith.' And then we try to figure out what they have in common.

Melissa Glenn Haber ’87, History Teacher

Chloe-Li-home-thumb

I was kind of shocked at how everyone talks with each other at Commonwealth. In my old school, people just stuck with their own friend groups. I thought it would be like that here—but it turned out to be exactly the opposite. I didn't expect to be able to communicate with seniors and juniors and sophomores at all. I feel really good in small communities. You feel seen.  

Chloe ’27

I get a real burst of energy when I’m able to help students navigate the complexities of the research process. I feel so lucky to have such an incredible patron base of high-level readers and thinkers in our students. 

Jake MacDonnell, Librarian and Registrar

There are all of these resources around us that we can take advantage of.… I like how part of your daily routine is going out into the city and still being with your classmates but in a completely different setting.

Felix ’27

You know, I was hearing about all these other schools, and they definitely had a lot to offer, but Commonwealth spoke more to me because I know they take academics seriously here, but they also care about you as a person and finding yourself. 

Sumaya ’26

By the Numbers

163

students in grades 9–12

63%

self-identified students of color

$1.8 million

financial aid granted for 2025–2026

85%

teachers holding advanced degree

5:1

student-to-faculty ratio

2

all-school getaways each year

1470

average SAT composite score (Class of 2026)

Happening Now

How Science Gets Done

Lauren Moo, M.D., ’84 and Marc Weisskopf, Ph.D., Sc.D.,’84 are two self-identified nerds who met at Commonwealth and went on to distinguished, and distinct, careers as scientists: Lauren as a cognitive behavioral neurologist and Marc as a neuroscientist and epidemiologist. Here they share what happens when the foundation you build on is not only shared research concerns, such as the human brain, aging, and dementia, but also a lifetime of friendship.

Faculty Projects: A Reading List for Math Philosophers

"I am a pure mathematician, not a historian," demurs Al Letarte. "It is the history of deductive thought as a basis for truth that I find most compelling." Even so, if you enjoy thinking about the origins and underpinnings of math (in addition to crunching the numbers), then you've found a compatriot in Mr. Letarte. For his most recent Hughes/Wharton project, he developed a new Mathematical Logic course, which he began by broadening his understanding of the global history of math, breaking from the largely Western voices that dominate the field. By following those diverse pathways, Mr. Letarte uncovered new ways of thinking about the philosophy of math—as well as his own identity as a teacher.

Meet Commonwealth Students: Will ’26, Listen Up

Will knows you can hear him. “People first told me I should do theater back in middle school, because I was very loud—as I still am now,” he quips. Over his four years at Commonwealth, he has used his voice to spectacular effect: As a champion of the Boys’ Soccer, Basketball, and Ultimate Frisbee teams at recess. Bringing Commonwealth’s mermaid mascot to life during a recent Hancock talent show. And, yes, through theater. But don’t mistake his hilarious turns on stage (and off) for a lack of substance. Like the sharpest comedic minds, Will is a keen observer, whether he’s looking across the throughlines of history or at life on an atomic scale.

Conversations with the Head: Carrie Healy, Director of Admissions and Financial Aid

When you look at the 163 students who make up Commonwealth's record enrollment this year, there is no “cookie-cutter” student, says Carrie Healy, Commonwealth’s Director of Admissions and Financial Aid, though you can see the same universal qualities that have drawn learners to Commonwealth since our earliest days. “Inquisitiveness, curiosity, a love of learning, and a willingness to do hard work”: those fundamentals haven’t changed, says Head of School Jennifer Borman ’81. Here, Jennifer and Carrie trace the evolution of admissions at Commonwealth, from post-pandemic pivots to their mission to keep Commonwealth affordable and other founding principles still at play.

Meet Commonwealth Students: Millie ’28, Past Small Talk

Millie ’28 wants to get to know you—the real you. A thespian, artist, and academic, Millie casts her social net wide, finding joy in the connections she forms and nurtures with the people around her. “Feeling like you’re seen and you can see others for who they are,” she says, is what it’s all about. And connecting with others is integral to how Millie lives: she wants to talk about classes, make people laugh, share artwork (the visual and performing kinds). While she’s at it, she leans exuberantly into the thrill that comes from a world-shifting English lesson, an intense afternoon of play rehearsals, or a classic Monty Python bit. Read on to catch some of her infectious enthusiasm for yourself.

At Commonwealth, we’re looking for inquisitive, driven, and creative students from a wide range of backgrounds. We encourage you to visit us, talk with teachers and students, and see if Commonwealth is right for you.