About Us

Sizer is a free & public charter school located in Fitchburg, Massachusetts, serving students in grades seven through twelve.

In a nutshell, our educational philosophy engages students in active learning and gives them voice in their educational journey. Our scholars develop skills focused on personal academic achievement and responsibility both in & out of the classroom. We believe that all students - regardless of where they start - can leave Sizer with the necessary tools to succeed in life and become leaders in their own communities. Our faculty and staff are some of the most dedicated and talented professionals in Massachusetts and are deeply committed to crafting engaging lessons, encouraging creativity, and guiding students as they grow and learn. 


Sizer School, a North Central Charter Essential School, is a public school where students are known personally, challenged intellectually, and participate actively in their learning. Guided by its commitment to diversity and inclusiveness, the school seeks to send graduates into the world who THINK for themselves, CARE about others, and ACT creatively and responsibly.


We are an innovative public school that meets each and every student where they are as individuals and learners. We do what it takes to inspire passionate, creative and life-long learners who achieve personal greatness, are prepared for the future and engage with and give back to the world.



Sizer School, A North Central Charter Essential School, complies with all state and federal regulations on safety and non-discrimination. Sizer School does not discriminate on the basis of race, color, national origin, creed, sex, gender identity, ethnicity, sexual orientation, mental or physical disability, age, ancestry, athletic performance, special need, proficiency in the English language or foreign language, or prior academic achievement.


We are a caring community and are like a family...we have each other's backs.

-Student Ambassador

There are friendships between grades and it's not clique-y.

-Tenth Grader


Learn about our school through the voices of our students! Check out past Student Corner interviews:

Matt, Class of 2018, is a Cross Country runner, Dungeons and Dragons player and aspiring game designer.

Selah, Class of 2023, is a math whiz. Find her in Art Club and see what she's been making.

Stephanie, Class of 2021, is a competetive figure skater who is also a peer mediator, tutor and American Sign Language student.

Alex, Class of 2023, is a budding DJ, turntable expert and is creating his own radio show. 

Alexis, Class of 2019 is a song-writer, and of course his favorite class is Chorus. He also started a winter coat drive for people in need.