About Us

Sizer is a free & public charter school located in Fitchburg, MA, 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.

This school is a community-based school. The students and teachers talk to you and make you feel included. ... They encourage you to be better and to do better. 

- Dominique, Grade 11

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

Adrien, Grade 7 is proud of his accomplishments in school, and loves doing hands-on activities during class. 

Sarah, Grade 8 plays soccer, acts in the Theatre Arts program, and is a fan of reading stories in English class.

Sky, Grade 8 loves how math is fun at Sizer - his teacher does cartwheels to demonstrate angle rotation! 

Will, Grade 12 did his incredible Art Independent study on color and Synesthesia.  

Dominique, Grade 11 is the Secretary of the Green Team, huge fan of Biology class, and wants to be a Surgeon someday (we know she will).

Alexis, Grade 10 is a song-writer, and of course his favorite class is Chorus. He also started a winter coat drive for people in need. 

Ma’ayan, Grade 7 participates in the Dance Club as well as being a Student Ambassador and member of Student Council. 

Julie, Grade 12, has been a star member of the Cross Country team and plans to join Americorps after graduation. 

Maya, Grade 9, loves to read and write so much that she practically has her own seat in the library!