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An Independent School in Littleton, MA serving Students Ages 15 Months–Grade 8

Accepting Applications for the 2025-2026 school year — Click here to get started.

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2024 Reunion Event

Welcoming all former students as well as Alumni! FORMER STUDENTS & ALUMNI near and far are invited to gather for our annual Reunion Night! Reminisce, socialize, and reconnect with former...

Recurring

Monday Morning Meeting

Parents are always invited to join Children's House through Middle School students for this gathering that includes announcements, songs, and sometimes an informal presentation or performance. Specific programming will be...

XC AWAY v. Wellan Montessori

Wellan Field - Newton 70 Paul St, Newton, MA, United States

Students will return to OMMS around 5:30pm.

Recurring

Open Art Studio

Every Wednesday 8:30-10:00am Every Wednesday, Art teacher Catherine Karp hosts Open Art Studio for parents and friends of the OMS Community to work on a self-guided art project in the...

Recurring

Open Art Studio

Every Wednesday 8:30-10:00am Every Wednesday, Art teacher Catherine Karp hosts Open Art Studio for parents and friends of the OMS Community to work on a self-guided art project in the...