SchoolClaimed

Cornerstone Montessori Children’s House

Casa

0.0(0)

31700 NW Commercial St. #580, North Plains, OR 97133, North Plains, Oregon 97133

Tuition The monthly or yearly range this school has told us they charge, broken out by stage below.Source: Provided by the school

$460–$500 USD/mo

Stages Montessori groups children into multi-year stages by developmental period, not single grades.Source: Provided by the school

Casa

About

The Washington County families we serve enjoy a comfortable, family-like atmosphere where the children are able to interact in a uniquely Montessori way. The low student-teacher ratio at this preschool in the Hillsboro School District also helps ensure that each child receives the individual attention they deserve. We offer an activity filled day that encourages the students' intellectual, social, physical, creative and moral development in a caring, nurturing environment. Most importantly, our Montessori program fosters a love for learning that will stay with your child for a lifetime.

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Tuition & Programs

Casa$460–$500 USD/month

School profile

Basics

Legal / licensee name: Cornerstone Montessori Children's HouseConfirmed by the school, Oct 2026
Founded: 1,997Confirmed by the school, Oct 2026
Opening hours: Monday-Thursday 8:30-12:30Confirmed by the school, Oct 2026

Programs

Programs offered: CasaConfirmed by the school, Oct 2026
Casa: Age range: Up to 6 yearsConfirmed by the school, Oct 2026
Casa: Half / full day: Half dayConfirmed by the school, Oct 2026
Casa: Children per adult: 8 children per adultConfirmed by the school, Oct 2026
Casa: Openings: Openings nowConfirmed by the school, Oct 2026

Tuition and fees

Casa: Tuition: $500 USD/monthConfirmed by the school, Oct 2026

Staff

Background checks for all staff: YesConfirmed by the school, Oct 2026

Daily life

Meals: Families bring lunchConfirmed by the school, Oct 2026

Language

Languages of instruction: EnglishConfirmed by the school, Oct 2026

Staff

Lead teachers: 1
Assistants: 1
Teaching staff: 2
Lead teachers with Montessori training: 100%
AMI-trained staff: 1
Average years of experience: 34
Staff staying from last year: 100%

Counts and shares only. We don't list individual staff.

Is this an accredited Montessori school?

No accreditation or membership from a recognized Montessori body (AMI, AMS, or Montessori Canada) is on file for this listing. Because "Montessori" isn't a protected trademark in the US or Canada (a 1967 US trademark ruling put the term in the public domain in the US), any school can use the name regardless of how closely it follows the method. That doesn't mean this school isn't authentically Montessori; it means accreditation status isn't the way to check here. Ask the school directly about their teacher training (look for AMI or AMS-trained staff) and ask to observe a classroom work cycle.

Accreditation is not the same as an operating licence. A provincial/state child care licence or private school registration only confirms a school is legally allowed to operate — it says nothing about whether the teaching method is Montessori.

Teacher credentials matter too. Ask how many lead teachers hold AMI, AMS, or MACTE-accredited teacher training — a strong signal independent of the school's own accreditation status.

Full guide: how to verify any Montessori school →