Uncommon Community

Uncommon Curiosity

Uncommon Opportunity

Meet Faculty and Students

It is humbling and exhilarating to come to work every day to a place where people are working for a common goal with such a mix of competence and humanity.

César Pérez, History, Languages

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My eighth-grade self would never have believed I would love homework so much.

Ilaria ’22

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Commonwealth taught me how to interact with different people, and I think I've learned a lot of skills regarding meeting new people.  It's having that safe space, where I can make myself uncomfortable, but I also have my advisor and I have friends who support me. 

Avery '23

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Commonwealth attracts a great mix of students that I've made a lot of strong connections with. In that area, it was much easier for me than I expected to feel comfortable going up and talking to new people, since everyone is getting to know each other the same way you are.

Ben ’23

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My students teach me so much that each subsequent year the course is informed by their insights.

Melissa Glenn Haber '87, History

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Classes have been absolutely amazing. The teachers here really care about what they’re teaching, and that makes all the difference.

Olivia ’24

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By the Numbers


students in grades 9-12


students of color

$1.5 million

financial aid granted for 2020-2021


teachers holding advanced degree


student-to-faculty ratio


all-school weekend trips each year


National Merit Finalists, Semifinalists, or Commended Students on average

Happening Now

Image of Commonwealth alumna Pietra Check standing in the woods wearing a burgundy turtleneck.

We often conflate equity with equality. But equity seeks fairness: it recognizes differences between people in status, context, or history. Below you'll meet two Commonwealth School alumnae whose work and passions, empowering girls and advancing health equity in communities, are dedicated to helping us better understand what equity really means, why it is an urgent social justice issue, and what a more equitable society might look like.

Sophomore Receives Award for Bathroom Access Work

At the opening of the 20212022 academic year, Amith ’24 was poised to make a community-wide impact in the city of Somerville. Now, this sophomore is being recognized for the innovative tool, bathroomaccess.com, that he created, and his plans are only expanding from here.


Part of the second-ever cohort of Dive In Commonwealth students, Sienna spent her first summer in a hybrid version of the program. Now she’s using some of the skills and confidence she cultivated at Dive In to push herself academically, socially, musically, and more, as her father, Charles, can attest. Both sat down with Dive In program director Sasha Eskelund to catch up and look back...

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.