Rsu 21 School District
School District · Kennebunk, Maine
Avg Rating
6.2
out of 10
Schools
6
4 elem, 1 mid, 1 high
Per-Pupil Spending
$21,300
Student-Teacher Ratio
11.9:1
Avg Rating
6.2
out of 10
Schools
6
4 elem, 1 mid, 1 high
Per-Pupil Spending
$21,300
Student-Teacher Ratio
11.9:1
Evaluating Rsu 21?
A district shares budget, policy, and attendance zones across its schools — use this page to judge Rsu 21 as a whole, then compare how its individual schools differ.
Shortlist starter
Start with these real page-level signals, then use the full table and map below.
Mildred L Day School
Arundel · Elementary. Compare this profile against district averages, level fit, and attendance-zone reality below.
Kennebunk High School
Kennebunk · High. Compare this profile against district averages, level fit, and attendance-zone reality below.
Middle School of the Kennebunks
Kennebunk · Middle. Compare this profile against district averages, level fit, and attendance-zone reality below.
How this district compares
Maine rank
#62 of 108
districts by avg. composite
Vs. state average
+0.0
above Maine avg
Per-pupil spending
$21,300
+$2,444 vs Maine median
District size
2,401 students
Larger than Maine median
The short answer
Rsu 21 ranks #62 of 108 Maine districts by overall school rating. Rsu 21's schools with real test data average 6.2/10 across 6 schools. Its top-rated schools are Mildred L Day School (7.8/10), Kennebunk High School (7.2/10), and Middle School of the Kennebunks (7.1/10). Schools with estimated (proxy) scores are excluded from this ranking.
Top-Rated Schools in Rsu 21
Ranked by MySchoolScout composite rating using only schools with real test data (6 of 6). "Value" = points above what student poverty predicts. Estimated (proxy) scores are excluded.
| # | School | Rating |
|---|---|---|
| 1 | Mildred L Day School | 7.8 / 10 |
| 2 | Kennebunk High School | 7.2 / 10 |
| 3 | Middle School of the Kennebunks | 7.1 / 10 |
| 4 | Sea Road School | 6.7 / 10 |
| 5 | Kennebunkport Consolidated Sch | 5.1 / 10 |
| 6 | Kennebunk Elementary School | 3.3 / 10 |
See all 6 schools — including those with estimated data — in the full directory below. How we rate schools.
About Rsu 21
Rsu 21 is a Kennebunk, Maine school district serving 6 schools. The district educates 2,401 students with a student-teacher ratio of 11.9:1. The district invests $21,300 per student annually.
With an average rating of 6.2/10, Rsu 21 demonstrates solid academic performance.
The highest-rated school in the district is Mildred L Day School, which has a composite score of 7.8/10.
In standardized testing, Rsu 21 students show an average math proficiency of 72.7% and ELA proficiency of 78.2%.
The district includes 4 elementary schools , 1 middle school , and 1 high school.
District Map
Schools in Rsu 21, colored by MySchoolScout rank. Click a pin for details.
District Average Test Scores
Average proficiency across all schools in Rsu 21 with test data.
Schools in Rsu 21
6 schools Elementary Schools 4
Middle Schools 1
High Schools 1
District Details
- State
- Maine
- City
- Kennebunk
- Total Enrollment
- 2,401
- Teachers (FTE)
- 202
- Child Poverty Rate
- 0.1%
- Data Year
- 2023
Frequently Asked Questions
How many schools are in Rsu 21?
Rsu 21 has 6 schools in total — 4 elementary, 1 middle, and 1 high schools. You can explore each school's ratings and details on this page.
What is the average rating for Rsu 21?
The average composite rating for Rsu 21 is 6.2/10. This score is calculated from the individual ratings of all schools with academic data in the district.
What is the per-pupil spending in Rsu 21?
Rsu 21 spends $21,300 per student per year.
What is the student-teacher ratio in Rsu 21?
The average student-teacher ratio in Rsu 21 is 11.9:1.
What is the top-rated school in Rsu 21?
Mildred L Day School is the highest-rated school in Rsu 21 with a composite score of 7.8/10.
What are the test scores in Rsu 21?
Across schools in Rsu 21 with test data, the average math proficiency is 72.7% and the average ELA (reading/writing) proficiency is 78.2%. These figures represent the percentage of students meeting or exceeding grade-level standards.
How does Rsu 21 compare to other districts in Maine?
Rsu 21 has an average school rating of 6.2/10 across 6 schools. Families can compare this to other districts in Maine by visiting individual district pages. Factors like school size, available programs, and community demographics also play a role in choosing the right fit.
How does MySchoolScout rate schools?
MySchoolScout ratings blend student growth, poverty-adjusted academic performance, and learning environment — plus college readiness for high schools. Weights vary by school level, and equity data is shown for context without being factored into the score. Learn more about our rating system on our methodology page.
District Averages
- Overall Rating
- 6.2/10
- Math Proficiency
- 72.7%
- ELA Proficiency
- 78.2%
Resources
How we rate schools
A clear 1–10 score built from public data — growth, academics, and learning environment. No hidden criteria, no pay-to-play.
See how we rateOther School Districts in ME
Compare Rsu 21 with neighboring districts in the state.
- Portland Public Schools (17)
- Bangor Public Schools (10)
- Rsu 17/msad 17 (10)
- Auburn Public Schools (8)
- Lewiston Public Schools (8)
- Rsu 03/msad 03 (8)
- Rsu 06/msad 06 (8)
- Rsu 54/msad 54 (8)
- Rsu 18 (8)
- Rsu 09 (8)
- Augusta Public Schools (7)
- Rsu 40/msad 40 (7)
- South Portland Public Schools (7)
- Rsu 57/msad 57 (7)
- Rsu 60/msad 60 (7)
- Rsu 75/msad 75 (7)
- Rsu 01 - Lkrsu (7)
- Rsu 22 (7)
- Rsu 71 (7)
- Biddeford Public Schools (6)
- Sanford Public Schools (6)
- Scarborough Public Schools (6)
- Rsu 11/msad 11 (6)
- Rsu 79/msad 01 (6)
Data from NCES Common Core of Data, Maine Dept. of Education, and U.S. Census ACS for the 2023–24 school year. Rankings computed by MySchoolScout. See all data sources.
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