What Rainier Prep Public Charter School does

Rainier Prep is a public charter middle school serving students in grades 5 through 8 in the Highline/South King County area of Seattle, Washington. Founded in Fall 2015 and operating under Washington State charter law as a 501(c)(3) nonprofit (Tax ID: 80-0956961), the school's stated mission is to prepare all students to excel at four-year colleges and become leaders in their communities. The student body is 96% students of color and 80% from limited-income families, with a full inclusion model and lottery-based open enrollment. Rainier Prep has earned Washington State School Recognition for outstanding student growth for three consecutive years (2022-23, 2023-24, 2024-25), making it the only public middle school in the state to achieve this distinction.

The school delivers its educational program through several integrated components: a College Success Program that begins in 5th grade to build college and career awareness; an Advisory Program that pairs each student with a teacher-mentor for social-emotional and academic support (12-15 students per advisor); and quarterly Enrichment Activities in arts, athletics, STEM, and social justice. Its educational philosophy is anchored in the GUIDES values framework (Growth, Unity, Integrity, Discovery, Engagement, Stewardship). Technology infrastructure consists of standard third-party ed-tech platforms: SchoolMint for online enrollment applications, ParentSquare for family communication, Edupoint's ParentVUE/StudentVUE for grade access, and Bloomerang for donation processing. Rainier Prep operates no proprietary technology and has no disclosed AI capabilities.

As a free public charter school, Rainier Prep is funded primarily through Washington state per-pupil allocations tied to enrollment, with no tuition charged to families. A secondary revenue stream comes from charitable donations and grants processed through the 501(c)(3) structure. The school is fully enrolled for the 2025-26 academic year with a waitlist for new applicants and serves its student body with approximately 37 employees. It is governed by an independent Board of Directors chaired by Andy Jassy (President and CEO of Amazon.com), with strategic operational support from partner organization Rainier Scholars, which provides curricular, operational, and technical assistance aligned with the shared mission of college preparation for low-income students of color and immigrant students.

Name

Rainier Prep Public Charter School

Legal name

Rainier Prep

Website

https://rainierprep.org

Company type

Private

Founded year

2015

Operating status

Operating

Short description

Rainier Prep is a free public charter middle school in Seattle's South King County serving grades 5-8. Founded in 2015, the 501(c)(3) nonprofit uses state per-pupil funding plus donations, currently enrolling a student body that is 96% students of color.

Ownership category

akta.pro rank

Product category

K-12 Charter School Education

NAICS

Elementary and Secondary Schools (611110), Elementary and Secondary Schools (6111)

SIC

Services-Educational Services (8200)

akta.pro primary industry

Charter College-Prep & Advanced Academics Schools (EDAJACAJ)

akta.pro secondary industry

K–12 Support & School Improvement Nonprofits (BPAGADAB)

Keywords

• Public charter school
• Middle school education
• College preparation programs
• Community-based learning
• K-8 charter school

Headquarters

HQ city

Seattle

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2C

Offering type

Services

Cost components

Personnel, Operations, Infrastructure, Technology or R&D, Marketing or Sales, Others

Revenue model

1. Per-Pupil State Funding: Public charter school funded primarily through state per-pupil allocation based on student enrollment, similar to traditional public schools
2. Donations and Grants: 501(c)(3) nonprofit organization accepting charitable donations to support programs. Tax ID: 80-0956961

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels4 records

Core offering

Rainier Prep is a free, open-enrollment, full inclusion public charter school serving students in grades 5 through 8 in the Highline/South King County area of Seattle, Washington. Its core offering is a rigorous middle school education paired with a College Success Program starting in 5th grade, an Advisory mentorship program, and Enrichment Activities in arts, athletics, STEM, and social justice, all delivered at no cost to families. The school is funded through state per-pupil allocations and charitable donations as a 501(c)(3) nonprofit.

Product overview

Rainier Prep is a 5th-8th grade public charter school that operates as a single, unified educational institution rather than a platform-plus-modules architecture. The school's core offering is its middle school education program, which is supported by integrated components including the College Success Program (providing college and career preparation from 5th grade onward), the Advisory Program (student mentorship and social-emotional development), and Enrichment Activities (after-school programs in arts, athletics, STEM, and social justice). The GUIDES values framework (Growth, Unity, Integrity, Discovery, Engagement, Stewardship) provides the philosophical foundation for all programs. All services are provided at no cost as a public charter school under Washington State law.

Differentiator

Problem solved

Functional benefit

Products and services

• Middle School Education (5th-8th Grade) Free, open-enrollment public charter school education for students in grades 5 through 8, following a full inclusion model that focuses on academic rigor combined with social-emotional development for students in the Highline/South King County area of Seattle, WA.
• College Success Program A comprehensive program equipping Rainier Prep students with skills and knowledge to navigate and access college and career pathways. Students visit local businesses and colleges, explore career pathways, and develop a High School and Beyond Plan.
• Advisory Program A cornerstone program at Rainier Prep in which one teacher-advisor mentors 12-15 students throughout the year. Students build social and organizational skills, support reading goals, and work closely with families to navigate middle school challenges.
• Enrichment Activities After-school activities designed for Rainier Prep students to explore new areas of study, discover passions, and develop beyond the academic classroom. Students rotate between two different activities each quarter in areas such as sports, dance, music, languages, media, and arts.

Quantifiable outcome

• Top 10% statewide in Student Growth Percentile (SGP) in ELA and Math
• +2 more outcomes

Named customers3 records

Segments3 records

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration5 records

Partnerships

Four partnerships are on record, tiered core and minor.

• Rainier ScholarscoreStrategic or Co-development PartnerSeparate entity sharing common goal around college preparation and leadership development for low-income students of color and immigrant students. Rainier Scholars provides curricular, operational and technical support to Rainier Prep. Rainier Scholars is a long-term wrap-around academic enrichment program while Rainier Prep is a free public charter middle school.
• Harlow's TrailwaysminorOthersThird-party bus service operator providing student transportation for Rainier Prep. Buses serve students within Highline Public Schools boundary.
• Fresh n' Local Foods CompanyminorOthersFood service provider delivering breakfast and lunch meals to all enrolled Rainier Prep students at no cost.
• Washington State Charter School CommissioncoreOthersAuthorizing body for Rainier Prep's charter. Oversees compliance and receives complaints regarding charter school operations.

Scale indicators5 records

Recent moves5 records

Expansion highlights4 records

Direct peers

• YES Prep Public Schools: Texas-based public charter school network serving grades 6-12 with a college-prep mission, particularly for students of color and limited-income families. Highly comparable as a charter middle school operator serving similar demographics; Rainier Prep's Assistant Principal was recruited directly from YES Prep Southwest.

Broad incumbents

• KIPP Public Schools: National nonprofit network of college-preparatory public charter schools serving grades K-12, with deep presence in underserved communities. Comparable as a larger, established charter operator pursuing similar equity and college-access outcomes, though operating at much greater scale across multiple states.
• Summit Public Schools: California-based charter school network serving grades 6-12 with a college-prep focus on underserved students. Comparable as a charter middle/high school operator using rigorous academics and student support structures aimed at college readiness in similar demographic communities.
• Aspire Public Schools: California-based nonprofit charter school network serving grades K-12 with a college-prep focus on underserved communities. Comparable as a larger, established charter operator pursuing equity-driven college readiness outcomes in similar demographic populations.
• IDEA Public Schools: National public charter school network serving grades K-12 with a mission focused on college readiness for students in underserved communities. Comparable as a larger, established charter operator with similar equity-and-growth value proposition, though at materially greater scale and geographic scope.
• Alliance College-Ready Public Schools: Los Angeles-based nonprofit charter school network operating grades 6-12 with a college-prep mission targeting students of color and low-income families. Comparable as a charter middle/high operator pursuing similar equity and college-access outcomes for historically underserved populations.

Others

• Rainier Scholars: Seattle-based nonprofit providing long-term academic enrichment and college-access support for students of color and limited-income families. A Core strategic partner of Rainier Prep, sharing mission overlap and providing curricular, operational, and technical support; distinct entity but operates as the upstream pipeline.

Regional players

• Highline Public Schools: The traditional public school district within which Rainier Prep operates, providing the geographic boundary for student transportation services. Comparable as the alternative middle school option for South King County families, with overlapping demographics but a non-charter governance structure.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat3 records

Key risks4 records

Key highlights6 records

Customer concentration

• Facebookfacebook.com/rainierprep
• Instagraminstagram.com/rainierprep

Compliance4 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Rainier Prep Public Charter School