Enrollment
289
Middle
DISTRICT 448 · STATE 379
SCHOOL COMMUNITY·PEMBROKE SCHOOL DISTRICT·NCES 330558000042
Three Rivers School
243 Academy Rd., Pembroke, NH 03275 · (603) 485-9539 · Merrimack County
GRADES 05–08MIDDLE22-SUBURBREGULAR SCHOOL289 STUDENTS
B
allk12 Grade
Scored higher than 58% of New Hampshire public middle schools
- BTest scores Share of students meeting the state standard in reading, math, and other tested subjects, 2023-24 and 2024-25.
- B-Beats expectations How far test scores land above or below what the share of low-income students predicts for a school in this state.
- ·Three-year trend Not available for this school, so the grade uses the other parts.
Grades compare a school only with schools in the same state, because every state gives its own test. How grades work · Top-graded New Hampshire public middle schools
Student : Teacher
10.0:1
29 FTE teachers
DISTRICT 11.1:1 · STATE 11.1:1
Free / Reduced Lunch
20%
57 students
DISTRICT 22% · STATE 26%
Community
0
0 members
Enrollment and student:teacher ratio compared against other middle schools. Free/Reduced Lunch and demographics compared against all schools.
Enrollment by grade, 2024-25
| Grade | Students | Share |
|---|---|---|
| Grade 5 | 63 | 22% |
| Grade 6 | 76 | 26% |
| Grade 7 | 82 | 28% |
| Grade 8 | 68 | 24% |
Student demographics
22%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 20% · STATE 33% · US 70%
Student head counts by race/ethnicity from federal NCES enrollment data. District, state, and US figures are each group's share of all public school students in that area (US excludes territories). Very small groups may be suppressed in the source, so categories do not always sum exactly to total enrollment.
Gender split
School pathway
Students here typically continue to
Three Rivers School→Pembroke Academy
Feeds from
Based on grade levels within Pembroke School District. Attendance zones can vary; confirm enrollment with the district.
Test scores
NHSAS 2024-25 . % Above ProficientEnglish Language Arts
57.0%
NH avg 55.2%
Math
42.0%
NH avg 43.0%
What this means: On the NHSAS, New Hampshire's statewide test, about 57 of every 100 students at this school read and write at grade level and about 42 of 100 do math at grade level. Across all New Hampshire schools, those numbers are about 55 and 43.
Source: NHSAS. All students, all grades. See all years and grades →
BeatsExpectations
Demographically-adjusted score · methodologyTier
AS EXPECTED
Performing as predicted given the school's student profile
Actual proficiency
47.9%
composite math + reading, all grades
Predicted
50.8%
based on NH schools with similar FRL share
Beats by
-3.0pp
below demographic expectation
What this means: About 48% of students here test proficient in math and reading, compared with the roughly 51% typical for New Hampshire schools with a similar share of low-income students. BeatsExpectations measures results against demographically similar schools rather than by raw scores, and this school falls within the typical range, neither among New Hampshire's top nor bottom 10%.
BeatsExpectations runs a per-state regression of proficiency on free/reduced-lunch share, then scores each school by residual. How this is calculated →
Schools most like Three Rivers School
Three Rivers School's state test result (47.9% proficient) is higher than 2 of the 5 schools below with a result.
| School | Students | Low-income | Proficient |
|---|---|---|---|
| Three Rivers School this school | 289 | 19.7% | 47.9% |
| Conant Middle High School (M) Jaffrey | 241 | 22.8% | 33.4% |
| Hampton Academy Hampton | 313 | 19.5% | 61.3% |
| Gilford Middle School Gilford | 277 | 15.9% | 54.8% |
| Epping Middle School Epping | 194 | 21.1% | 45.0% |
| David R. Cawley Middle School Hooksett | 428 | 15.9% | 57.9% |
Matched among New Hampshire middle schools on enrollment, the share of students from low-income families (eligible for free or reduced-price lunch), and racial and ethnic makeup. Proficient is the average share of students meeting the state standard across all of the school's state tests in 2023-24 and 2024-25, the same combined score our test-score rankings use. Online schools and schools serving specialized populations are not matched.
Where Three Rivers School ranks
Among middle schools| Measure | This school | In New Hampshire | In Merrimack County |
|---|---|---|---|
| State test proficiency ranked highest first | 47.9% | #33 of 85 | #6 of 10 |
| Math proficiency ranked highest first | 42.0% | #37 of 85 | #6 of 10 |
| Reading proficiency ranked highest first | 57.0% | #35 of 85 | #6 of 10 |
| Enrollment ranked largest first | 289 | #57 of 101 | #7 of 12 |
| Students per teacher ranked fewest first | 10.0:1 | #19 of 74 | #1 of 8 |
| Diversity index ranked most diverse first | 21.6% | #46 of 74 | #5 of 8 |
| Free and reduced lunch ranked highest share first | 19.7% | #53 of 90 | #6 of 11 |
| Enrollment change since 2017-18 ranked steepest decline first | -15.7% | #21 of 57 | #3 of 6 |
Ranked against other public middle schools. Online schools are left out of every list, and test-score lists leave out schools that serve specialized populations. Each rank links to the full list. Arrows under a test-score rank show places moved since the prior test year, among schools tested both years.
4-year change
SY 2020-21 vs SY 2024-25Enrollment
289
-23 (-7%) vs 2020
-29% since 2000-01, when it was 409
Student : Teacher
10.0:1
was 9.8:1
Source: NCES Common Core of Data
Enrollment and staffing by year
| School year | Students | Teachers (FTE) | Students per teacher | Free and reduced lunch |
|---|---|---|---|---|
| 2024-25 | 289 | 29 | 10.0:1 | 20% (57) |
| 2023-24 | 318 | 33 | 9.6:1 | 22% (69) |
| 2022-23 | 316 | 33 | 9.6:1 | 22% (70) |
| 2020-21 | 312 | 32 | 9.8:1 | 21% (66) |
| 2017-18 | 343 | 32.8 | 10.5:1 | 25% (86) |
| 2015-16 | 344 | 34 | 10.1:1 | 27% (93) |
| 2010-11 | 352 | 35 | 10.1:1 | 29% (103) |
| 2000-01 | 409 | 34 | 12.0:1 | 16% (64) |
Source: NCES Common Core of Data. Rows are the federal collections on file for Three Rivers School.
Since 2017-18: students down 16% (343 to 289); teachers down 12% (32.8 to 29).
About Three Rivers School
Three Rivers School is a low-enrollment middle-grades school based in Pembroke, New Hampshire. The school's 289 students are in grades 5 through 8. Enrollment is 24% lower than the average for middle schools in New Hampshire, which is about 379.
Across its 3 schools, Pembroke School District enrolls 1,345 students. Three Rivers School is one of those schools.
At Three Rivers School, White students make up 88% of the student body. The remaining students are 6% multiracial and 4% Hispanic. The county population is about 91% White, within a few points of the school. Three Rivers School has a diversity index of 22%, compared with 70% for all US public school students.
Dividing enrollment by its 29 full-time-equivalent teachers gives a ratio of about 10.0:1. The average ratio among middle schools in New Hampshire is 11.1:1, higher than at this school. Three Rivers School reports 20% of students eligible for free or reduced-price meals.
The allk12 Grade for Three Rivers School is B. Compared with New Hampshire public middle schools, the school scored higher than 58% on a mix of test scores, poverty-adjusted results, and recent trend.
On BeatsExpectations, Three Rivers School is 3.0 points below its prediction, a result in the middle 80% of New Hampshire schools.
Within Merrimack County, median household income is about $97,004, about 39% of adults have at least a bachelor's degree, and roughly 4% of residents are in poverty. Federal data list 61 public schools in Merrimack County, with a combined enrollment of about 17,429.
Pembroke Academy is the nearest neighboring public school, about 0.2 miles away. A five-mile radius around the school includes at least 8 other public schools. Three Rivers School ranks 4th of 6 among nearby schools on average proficiency, with 47.9% against a local average of 52.5%.
The school is in a suburban area outside a principal city, within an urbanized area with a population between 100,000 and 250,000, according to its NCES locale (Suburb: Mid-size).
The number of students declined from 312 to 289 over 4 years.
The discussion area below is open to posts about enrollment questions, class placement, and PTA news. Reviews and ratings from people who know the school are welcome.
Merrimack County at a glance
View full county profilePopulation
155,967
Census ACS
Median income
$97,004
Household, ACS
Bachelor's+
39%
Adults 25+
Poverty rate
4%
Below federal line
Schools in county
61
17,429 students
Quick facts
Related schools
Other schools in Pembroke School District
- Pembroke AcademyHigh · 744 students
- Pembroke Hill SchoolElementary · 312 students
Other schools in Pembroke
- Pembroke AcademyHigh · 744 students
- Strong Foundations Charter SchoolElementary · 337 students
- Pembroke Hill SchoolElementary · 312 students
Other Three Rivers schools
One other US public school is named Three Rivers. Three Rivers School is the largest of the 2.
- Three Rivers SchoolChannahon, IL · 268 students
Nearby schools
- Pembroke Academy0.2 mi · 744
- Pembroke Hill School1.1 mi · 312
- Armand R. Dupont School1.3 mi · 130
- Allenstown Elementary School1.5 mi · 205
- Allenstown Community School1.6 mi · 348
- Strong Foundations Charter School3.8 mi · 337
Frequently asked questions
About Three Rivers SchoolHow large is Three Rivers School?
Three Rivers School enrolls approximately 289 students in grades 05-08.
Is Three Rivers School an elementary, middle, or high school?
Three Rivers School is a middle school covering grades 05-08.
What is the student-teacher ratio at Three Rivers School?
The student-to-teacher ratio at Three Rivers School is approximately 10.0:1 (29 FTE teachers).
How diverse is Three Rivers School?
Three Rivers School reports a student body of 88% White, 4% Hispanic, 0% Black, 1% Asian, 6% Two or more.
What district is Three Rivers School in?
Three Rivers School is part of Pembroke School District.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.