Three Rivers School

Set in Pembroke, New Hampshire, Three Rivers School is a tight-knit middle-grades school, run under Pembroke School District. It instructs 289 students across grades 5 through 8. That puts it 24% smaller than the typical public school in New Hampshire, which averages around 379 students.

Across the 3 schools in Pembroke School District (1,345 students total), Three Rivers School accounts for its share of the district's footprint.

For racial and ethnic makeup, Three Rivers School shows that the student body is overwhelmingly White (88%). Beyond that, the school shows 6% multiracial, 4% Hispanic. Compared to Merrimack County overall, the school's racial mix sits in roughly the same range.

On the resource side, Three Rivers School lists 29 full-time-equivalent teachers, putting the student-to-teacher ratio at about 10.0:1. Statewide, the average ratio sits near 11.1:1, putting Three Rivers School tighter than the state norm the norm. Roughly 20% of students at Three Rivers School qualify for free or reduced-price lunch, often used as a Title I proxy.

Adjusting for the school's free-and-reduced-lunch share, Three Rivers School tracks the demographic baseline. The model predicts 50.8% given the school's FRL share; actual proficiency is 47.9%.

Across the wider county, Merrimack County reports that the typical household earns roughly $97,004 per year, 39% of adults hold a bachelor's degree or higher, and roughly 4% of residents live below the federal poverty line. Three Rivers School is one of 61 public schools in Merrimack County (combined enrollment of about 17,429 students).

Pembroke Academy is the nearest neighboring public school, about 0.2 miles from this campus. 8 of the 8 nearest public schools sit inside a five-mile radius. Among the 6 schools in that immediate cluster with test data (this one included), Three Rivers School ranks 4th on composite proficiency, below the local average of 52.5%.

Three Rivers School operates from an outer-ring location.

Five-year trend. Looking back 7 years, enrollment at Three Rivers School has ticked down 16%, going from 343 students in 2018 to 289 in 2025. The White share of enrollment declined from 92% to 88% over that span.

On this page, the page collects discussion, questions, and updates around pickup logistics, teacher feedback, and after-school programs. The community welcomes input from current and former families.