Regional School Unit 21
RSU 21 is a public K-12 school district in southern Maine operating six schools across Arundel, Kennebunk, and Kennebunkport, serving PreK-12 students with programs including IB, AP, special education, and career-technical education, funded by property taxes, state aid, and federal grants.
- Company typePrivate
- Founded2009
- HeadquartersMaine, United States
- Headcount251–500
- GTM typeB2C
- OfferingServices
What Regional School Unit 21 does
Regional School Unit 21 (RSU 21) is a public K-12 school district organized under Maine state law, serving the communities of Arundel, Kennebunk, and Kennebunkport in southern Maine (York County). The district operates six schools spanning PreK through grade 12: Kennebunk Elementary School, Kennebunkport Consolidated School, Mildred L. Day School, Sea Road School, Middle School of the Kennebunks, and Kennebunk High School. Academic offerings include the IB Diploma Programme, AP classes, a STEM Scholar Program, special education services, gifted and talented programming (GATES), and multilingual learner support. Students also access career-technical education through partnerships with three regional technical centers.
The district's technology stack is composed entirely of commercial off-the-shelf edtech platforms rather than proprietary systems: PowerSchool for student information, ADP for payroll/HR, Frontline for absence management, Cornerstone for professional development, BusRight for GPS-based transportation tracking, NWEA/AIMSWeb/Dial 4 for assessment, Google Apps for Education on a 1:1 Chromebook program, and Linq Connect for nutrition services. Supporting operations include a 54-person transportation department running 2,000+ daily route miles, a free school meals program for 2025-2026, and facility-safety compliance work (PFAS, radon, mold testing). NEASC accreditation covers Kennebunk High School.
RSU 21 is a government entity — not a commercially operating company — with no equity holders, no public revenue disclosure, and no commercial revenue model. Funding flows from local property taxes (subject to voter referendum), Maine state education funding, and federal grants (including ESSERF/ARP). Go-to-market is non-existent in the commercial sense; enrollment is residency-gated and handled through a centralized registration process. The district is governed by an elected School Board and is led by Superintendent Dr. Martin Grimm, who began a three-year contract on September 1, 2025.
Regional School Unit 21 firmographics
Firmographics- Name
- Regional School Unit 21
- Legal name
- Regional School Unit 21
- Website
- https://rsu21.net
- Company type
- Private
- Founded year
- 2009
- Operating status
- Operating
- Headcount range
- 251–500 employees
- Short description
- RSU 21 is a public K-12 school district in southern Maine operating six schools across Arundel, Kennebunk, and Kennebunkport, serving PreK-12 students with programs including IB, AP, special education, and career-technical education, funded by property taxes, state aid, and federal grants.
- Ownership category
- akta.pro rank
Regional School Unit 21 industry classification
Industry- Product category
- K-12 Public Education
- NAICS
- Elementary and Secondary Schools (6111), Elementary and Secondary Schools (611110)
- SIC
- Services-Educational Services (8200)
- akta.pro primary industry
- Public School Districts (K–12) (EDADABAA)
- akta.pro secondary industry
- District Student Services Administration (Special Ed, Counseling, Health) (EDADABAJ)
Keywords
Where Regional School Unit 21 is headquartered
LocationHeadquarters
- HQ city
- Maine
- HQ country
- United States
- HQ region
- North America
Offices8 records
Markets served
Regional School Unit 21 business model
Business model- GTM type
- B2C
- Offering type
- Services
- Cost components
- Personnel, Operations, Technology or R&D, Infrastructure
Revenue model
- Property Tax Revenue: Local property taxes from the towns of Arundel, Kennebunk, and Kennebunkport fund a significant portion of the school district's operating budget. The budget is approved through a voter referendum process.
- State Education Funding: Maine state funding for public education, distributed through the Maine Department of Education
- Federal Grants: ESSERF grants, ARP funding, and other federal education funding programs
- School Nutrition Program: National School Lunch Program providing meals to students; meals provided at no cost in 2025-2026 school year
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | Monthly | Free meals for all students 2025-2026 |
Go-to-market motion1 record
Distribution channels3 records
Marketing channels6 records
Regional School Unit 21 product offering
Product offeringCore offering
Regional School Unit 21 is a public school district that operates six schools across three Maine communities (Arundel, Kennebunk, Kennebunkport), delivering PreK-12 education including special education, gifted and talented, and multilingual learner programs. The district also provides supporting services such as student transportation, food and nutrition, athletics, and a 1:1 Chromebook program.
Product overview
Regional School Unit 21 is a public school district serving the communities of Arundel, Kennebunk, and Kennebunkport in Maine. The district operates six schools: Kennebunk High School (grades 9-12), Middle School of the Kennebunks (grades 6-8), and four elementary schools (Kennebunk Elementary School, Sea Road School, Mildred L. Day School, and Kennebunkport Consolidated School serving grades K-5). The district offers a comprehensive educational portfolio including a PreK program, Special Education services (Resource Room, RISE, LIFT, CSSP programs), GATES Gifted and Talented program, and Multilingual Learners support. Supporting services include Food and Nutrition Services (meals at no cost for 2025-2026), Transportation Services (with BusRight GPS tracking), and Athletics programs. The district utilizes technology platforms including PowerSchool for student information, ADP/Frontline for HR/payroll, Cornerstone for professional development, and NWEA/AIMSWeb for assessment. Kennebunk High School offers advanced programs including IB Diploma Programme, AP classes, STEM Scholar Program, and access to regional technical education centers.
Differentiator
Problem solved
Functional benefit
Products and services
- Kennebunk High School
Quantifiable outcome
- Free school meals provided to all students 2025-2026
Companies that use Regional School Unit 21
Customer profileNamed customers3 records
Segments3 records
Ideal customer profiles1 record
Regional School Unit 21 technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Integration13 records
Feature3 records
Regional School Unit 21 partnerships and signals
Strategic signalPartnerships
Ten partnerships are on record, tiered core and minor.
- New England School Development Council (NESDEC)coreNESDEC assisted RSU 21 in the superintendent search process in 2025, conducting community surveys, hosting focus groups, and providing consultation for the selection of Dr. Martin Grimm as superintendent from 15 applicants.
- Portland Arts and Technology High SchoolminorTechnical education partnership allowing KHS students to access career technical programs
- Sanford Regional Technical CenterminorTechnical education partnership for career technical programs
- Biddeford Regional Center of TechnologyminorTechnical education partnership for career technical programs
- George Mason UniversityminorPartnership for athletic trainers for middle school athletes and Dr. Grimm served as adjunct professor teaching graduate courses in educational leadership
- Education Foundation of the Kennebunks and ArundelminorNonprofit foundation supporting educational programs and fundraising for district schools
- Washington CommandersminorPartnership to create the first girls' flag football league in Virginia (Dr. Grimm's prior role in Prince William County)
- Maine Educational Association (MEA)corePartnership through MEA Benefits Trust for health insurance plans offered to district employees - five Anthem BlueCross BlueShield plan options
- Maine Public Employees Retirement System (MainePERS)corePension plans for employees working 25+ hours per week; teachers required to enroll in Teachers program, non-certified staff eligible for PLD program
- Southern Maine Regional Service CenterminorRegional service center providing shared services to southern Maine school districts
Scale indicators5 records
Recent moves5 records
Expansion highlights4 records
Regional School Unit 21 competitors and assessment
Company assessmentEmerging players
- Stride Inc. (formerly K12 Inc.): Public company providing online K-12 education and tutoring services. Comparable as a K-12 education provider, though delivery model (online vs. physical schools) and funding source (tuition/contracts vs. tax-funded) differ materially from RSU 21's traditional district model.
Direct peers
- Portland Public Schools: Largest public K-12 district in Maine, serving Portland and surrounding communities. Directly comparable to RSU 21 as a Maine public school district operating multiple schools funded by property taxes, state aid, and federal grants under the same Maine DOE regulatory framework.
- MSAD 35 (Marshwood): Maine School Administrative District serving Eliot, South Berwick, North Berwick, and Berwick. Comparable regional Maine public school district operating multiple schools under the same state funding framework as RSU 21.
- Biddeford School Department: Neighboring Maine public K-12 district that operates the Biddeford Regional Center of Technology, a partner site for RSU 21 students. Comparable public K-12 structure, scale, and southern Maine regional context.
- York School Department: Nearby York County, Maine public K-12 district of similar scale. Comparable coastal-Maine public school district serving multiple schools under the same state funding and regulatory framework as RSU 21.
- Sanford School Department: Neighboring Maine public school district that operates regional technical center partnerships used by RSU 21 students. Directly comparable as a public K-12 district in York County, Maine with similar funding mechanics and regulatory environment.
- Wells-Ogunquit Community School District: Southern Maine public K-12 district serving two towns with a comparable consolidated-district structure. Directly comparable as a multi-town public school district under the same Maine DOE oversight.
Broad incumbents
- KIPP Foundation: National network of public charter K-12 schools serving predominantly underserved communities. Comparable as a multi-school K-12 operator focused on college-prep outcomes, though operating under a charter rather than traditional district governance model.
- National Heritage Academies: Charter management organization operating 90+ K-12 public charter schools across the U.S. Comparable as a multi-school K-12 operator, though operates under charter contracts rather than traditional public school district governance like RSU 21.
- Success Academy Charter Schools: New York-based charter K-12 network known for rigorous academics and high test scores. Comparable to RSU 21's college-prep focus (IB, AP, STEM), but operates as a charter network rather than a traditional public school district.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat4 records
Key risks6 records
Key highlights7 records
Customer concentration
Regional School Unit 21 social profiles
Digital presenceRegional School Unit 21 financial estimates
Financial estimateRevenue estimate
Valuation estimate
Regional School Unit 21 leadership team
Management profileNumber of profiles
Profiles9 records
Regional School Unit 21 subsidiaries and ownership
Company hierarchySubsidiaries6 records
Regional School Unit 21 funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Regional School Unit 21 M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Regional School Unit 21
What does Regional School Unit 21 do?
Regional School Unit 21 is a public school district that operates six schools across three Maine communities (Arundel, Kennebunk, Kennebunkport), delivering PreK-12 education including special education, gifted and talented, and multilingual learner programs. The district also provides supporting services such as student transportation, food and nutrition, athletics, and a 1:1 Chromebook program.
Is Regional School Unit 21 a public or private company?
Regional School Unit 21 is a private company. It is classified as state government owned and is currently operating.
When was Regional School Unit 21 founded?
Regional School Unit 21 was founded in 2009. It employs 251 to 500 people.
Where is Regional School Unit 21 based?
Regional School Unit 21 is headquartered in Maine, United States, in the North America region.
How does Regional School Unit 21 make money?
Four revenue lines are on record. Property Tax Revenue is the primary driver. The others are state Education Funding, federal Grants and school Nutrition Program.
Who are Regional School Unit 21's main competitors?
Stride Inc. (formerly K12 Inc.) is listed as an emerging player. Direct peers are Portland Public Schools, MSAD 35 (Marshwood), Biddeford School Department, York School Department, Sanford School Department and Wells-Ogunquit Community School District. Broad incumbents are KIPP Foundation, National Heritage Academies and Success Academy Charter Schools.
Does Regional School Unit 21 have an API?
No public API is recorded for Regional School Unit 21.
What industry is Regional School Unit 21 in?
Regional School Unit 21's product category is K-12 Public Education. Its primary akta.pro industry code is EDADABAA, Public School Districts (K–12), with a secondary code of EDADABAJ, District Student Services Administration (Special Ed, Counseling, Health). Its NAICS code is 6111 and its SIC code is 8200.