Cornerstone Montessori School
1644 Gault St., Sumner, WA 98390Open, per Google (checked Oct 2, 2026)
Cornerstone Montessori School is a Montessori private school in Sumner, WA teaching grades PreK-6. It reported 41 students and about 5.9 students for every teacher in the 2023-24 federal survey.
School facts
- Grades
- PreK-6
- Students
- 41
- Teachers
- 7
- Students per teacher
- 5.9
- Student body
- Coeducational
- Program
- Montessori
- Affiliation
- Nonsectarian
- Setting
- Suburb
These are the numbers the school gave the U.S. Department of Education for the 2023-24 school year, published in July 2026. The survey counts students in kindergarten to grade 12, not pre-K. Enrollment and staffing move every year, so ask the school for today’s figures. Where this comes from. Something wrong? Tell us and we will fix it.
Cornerstone Montessori School tuition
We have not verified a tuition figure for Cornerstone Montessori School yet. Every private school sets its own price and most share it on request: ask for the full-year tuition for your child’s grade plus required fees, or look for a tuition page on the school’s website.
Questions to ask Cornerstone Montessori School
- What is the full-year tuition for my child’s grade, and which fees are required on top of it?
- Is there a waitlist or an application deadline for my child’s grade?
- Do you offer financial aid, sibling discounts or payment plans?
A school is the only source for its current price and open seats. Its website or admissions office can answer these.
Tuition at nearby private schools
| School | Published tuition | Year | Miles |
|---|---|---|---|
| Cascade Christian -Junior High/High School | $16,810 to $18,530 | 2026-27 | 1.6 |
| Cascade Christian - Puyallup Elementary | $14,940 to $15,240 | 2026-27 | 2.6 |
Each figure was read on that school's own website and is linked on its page. Ranges run from the lowest to the highest grade band.
Other private schools nearby
| School | Grades | Students | Miles |
|---|---|---|---|
| Northwest Christian School | K-8 | 204 | 1 |
| Cascade Christian -Junior High/High School | 7-12 | 622 | 2 |
| Cascade Christian School - McAlder Elementary | PreK-6 | 328 | 2 |
| Cascade Christian - Puyallup Elementary | K-6 | 355 | 3 |
| Berean Classical Christian School | K-9 | 52 | 4 |
| Salvation Christian Academy | PreK-10 | 250 | 5 |
| Celebration Center Celebration Kidz | PreK-2 | 37 | 6 |
| Holy Rosary Bilingual Academy | PreK-8 | 108 | 6 |
Private schools
Keep looking
- All private schools near Puyallup
- Montessori schools in Washington
- Private elementary schools in Washington
- Private middle schools in Washington
- Private schools with kindergarten in Washington
- Private schools with pre-K in Washington
- Private schools in Pierce County
- School choice in Washington: what is available
- Compare schools side by side
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