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Cornerstone Montessori Prep School vs Keystone School.

Side-by-side comparison of two Toronto private schools.

Cornerstone Montessori Prep School

Cornerstone Montessori Prep School

Toronto, ON

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Keystone School

Keystone School

Toronto, ON

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Detailed Comparison

Cornerstone Montessori Prep SchoolKeystone School
Annual Tuition$17,500$20,250
Boarding Tuition——
GradesPreschool to 126-12
CurriculumMontessori, AP, ChristianIB, OSSD, Project-Based
Enrollment110—
Avg Class Size1112
Student:Teacher——
Gender PolicyCo-edCo-ed
Founded19952016
BoardingNoNo
Financial AidNoYes
Acceptance Rate100%—
SportsVarsity SportsAthletic Club, Basketball, Volleyball, Soccer
ArtsMusic, Visual ArtCreative Art Club, Drawing, Painting, Photography
SpecializationsMontessori, Gifted, AP, TrilingualLanguages, STEM, Arts

Comparison Highlights

  • Tuition difference: $2,750/year
  • Class size difference: 1 students
  • Both schools are located in Toronto

Source: NextSchool verified school database

Last verified June 3, 2026Sources: NextSchool verified profilesData-driven comparison — no paid placements

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