Milton, Massachusetts 02186-2300 On Google Maps →
Thacher Montessori School
- 1.5–14 yrs
- Ages
- Toddler · Primary · Elementary · Secondary
- Levels
- $$$ · $20k+
- Tuition
- 10.9 : 1
- Ratio
- 140 students
- Enrollment
Facts & figures
From government filings and independent surveys — not the school's own marketing.
- Student-teacher ratio
10.9 : 1
140 students · 12.9 full-time-equivalent teachers
U.S. Dept. of Education private school survey, 2021–22
- School day
7.5 hours/day · 167 days/year
U.S. Dept. of Education private school survey, 2021–22
- Ownership
501(c)(3) nonprofit since 1978
$4.5M revenue (FY2023) · 24 years of IRS filings
- Age levels
Infant/Toddler · Primary · Lower Elementary · Upper Elementary · Secondary
From the school
Programs, tuition & schedule
"Through the Montessori Method, we embrace each child's unique potential and cultivate a passion for discovery. We empower children to achieve academic excellence and become confident, compassionate, and proactive members of the world community."
Accreditation & affiliations
- AMI USA · affiliated
- Montessori School Network · member
- AISNE · member
Source: school's homepage ↗
Programs offered
- Toddler — 18 months - 3 years
- Children's House — 2.9 - 6 years
- Lower Elementary — Grades 1-3
- Upper Elementary — Grades 4-6
- Middle School — Grades 7-8
- Before & After School Care
- Summer Program
Source: school's Tuition page ↗
Tuition
2026-27: Toddler Full Day $37,790; Toddler Half Day $29,100; Children's House AM $21,850; Children's House Full $28,360; Lower Elementary $29,150; Upper Elementary $30,400; Middle School $30,400
Source: school's Tuition page ↗
Schedule
8:00 AM - 3:00 PM (Children's House 8:20 AM - 2:45 PM); Before care from 7:00 AM; After care until 4:45 PM
Extended-day / aftercare available.
Admissions
How to apply
- Complete online inquiry form
- Attend admissions event or one-on-one tour
- Submit online application with $60 fee
- Prospective student visit with teachers
- Receive admissions decision
Deadlines: January 31 application due; March 10 decisions sent; April 10 response deadline
Source: school's Admissions page ↗
Good to know
About Thacher Montessori School
Thacher Montessori School is a Montessori school (private) in Milton, Massachusetts serving ages 1.5 - 14 years — AMS Accredited. Through the Montessori Method, we embrace each child's unique potential and cultivate a passion for discovery. We empower children to achieve academic excellence and become confident, compassionate, and proactive members of the world community.
Where is Thacher Montessori School located? ⌃
1425 Blue Hill Ave, Milton, MA 02186-2300
What is the phone number for Thacher Montessori School? ⌃
Thacher Montessori School can be reached at (617) 361-2522.
Is Thacher Montessori School accredited? ⌃
Thacher Montessori School lists the following accreditations or affiliations on its website: AMI USA (affiliated), Montessori School Network (member), AISNE (member).
How much is tuition at Thacher Montessori School? ⌃
Per Thacher Montessori School's own website: 2026-27: Toddler Full Day $37,790; Toddler Half Day $29,100; Children's House AM $21,850; Children's House Full $28,360; Lower Elementary $29,150; Upper Elementary $30,400; Middle School $30,400
How do you apply to Thacher Montessori School? ⌃
Thacher Montessori School's admissions process: Complete online inquiry form; Attend admissions event or one-on-one tour; Submit online application with $60 fee; Prospective student visit with teachers; Receive admissions decision.
What are the hours at Thacher Montessori School? ⌃
Thacher Montessori School operates on these hours: 8:00 AM - 3:00 PM (Children's House 8:20 AM - 2:45 PM); Before care from 7:00 AM; After care until 4:45 PM.
What ages does Thacher Montessori School serve? ⌃
Thacher Montessori School serves children aged 1.5 - 14 years.
What is the website for Thacher Montessori School? ⌃
The official website is thacherschool.org.