The Cornerstone School is deeply committed to laying the foundation upon which each child can build in order to become the architect of his or her own future.
The foundation consists of an open, inquiring mind, a loving heart, and a solid inner confidence that permits respect for our earth and its inhabitants.
The groundwork is laid in an environment of intellectual challenge, and close, supportive relationships among students, teachers, and parents.
Quick Stats (2025)
- Top Ranked NH School
- School Type: Montessori School
- Grades: Prekindergarten-8
- Enrollment: 163 students
- Application Deadline: None / Rolling
- Source: Verified school update
Top Rankings
The Cornerstone School ranks among the top 20% of private schools in New Hampshire for:
Category
Attribute
Student Body
School Overview
School Type
School Membership(s)School Assoc.
Religious Affiliation
Grades Offered
Grades Prekindergarten-8
Year Founded
1985
School Calendar
Student Body
Total Students
163 students
Student Body Type
Co-ed
% Students of Color
8%
State avg.: 17%
Students by Grade

Academics and Faculty
Total Classroom Teachers
28 teachers
Student : Teacher Ratio
6:1
National avg.: 13:1
Tuition and Acceptance Rate
Admission Deadline
None / Rolling
School Notes
- The Cornerstone School is deeply committed to laying the foundation upon which each child can build in order to become the architect of his or her own future. The foundation consists of an open, inquiring mind, a loving heart, and a solid inner confidence that permits respect for our earth and its inhabitants. The groundwork is laid in an environment of intellectual challenge, and close, supportive relationships among students, teachers, and parents.
Source: Verified school update
Frequently Asked Questions
What is The Cornerstone School's ranking?
The Cornerstone School ranks among the top 20% of private schools in New Hampshire for: Largest student body.
When is the application deadline for The Cornerstone School?
The application deadline for The Cornerstone School is rolling (applications are reviewed as they are received year-round).
School Reviews
5 8/8/2019
I have three children at this school. Each one of my kids has unique strengths and challenges with respect to their educational needs. I have loved the way this school has catered to these needs. The kids are with the same pair of caring teachers for 3 years, allowing them to develop a strong relationship and to be understood. We have had a wonderful experience at every classroom level.
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