Leo F Giblyn School, Freeport NY

Original Research by School Decision on Leo F Giblyn School

Leo F Giblyn School is a neighborhood elementary school serving kindergarten through fourth grade in Freeport on Long Island's South Shore. The school enrolls a small community of students, about a third of whom qualify for free or reduced-price lunch. The student body is predominantly Hispanic, with substantial Black and smaller Asian and white populations, reflecting Freeport's diversity as one of Long Island's most ethnically mixed communities.

On state math and English-language-arts assessments for the 2024-25 school year, the school's performance is solidly in the middle range. Third-grade math proficiency runs in the upper-60s, and fourth-grade math is notably stronger, reaching the upper-70s. English proficiency in third grade mirrors math, while fourth-grade English sits in the low-60s, trailing the math result. Science data from the most recent available test year shows stronger performance at the high-80s for fourth grade. The school's overall proficiency index across tested grades and subjects places it above the midpoint among the districts across Nassau County.

Participation rates in testing are consistently strong, holding in the low-to-mid 80s across subjects. This means the school is testing most of its students and the results represent a good read of the student population.

Data on special education enrollment or English-learner identification was not available, so a parent may want to ask the school directly about support services, particularly for multilingual students and students with IEPs. The school does not have readily available information on discipline, attendance, or staffing patterns from the sources reviewed.

Freeport itself is a dense, car-oriented South Shore village with strong maritime roots, centered on the Nautical Mile waterfront and linked to broader Long Island by the Freeport LIRR station. Most housing is older, built before mid-century, and the community's population has been flat to slightly declining. Home values and rents in the area are substantial, reflecting Nassau County's market; mortgage costs and monthly rents run high relative to regional benchmarks. The Freeport school district has held property-tax growth flat for roughly a decade, a significant financial anchor for resident families. The high school has expanded its AP offerings and added new computer science and advanced-pathway courses, building college-ready options upstream from elementary schools like Giblyn.

See more original research from School Decision →

Academic performance

How students perform on state tests, by grade, set against the district.

Math

Grade 368%

School 68% · District 71% · ▼ 2 pts below district

▲ 9 pts above state median · ▼ 7 pts below county median

Grade 477%

School 77% · District 83% · ▼ 6 pts below district

▲ 19 pts above state median · ▼ 1 pts below county median

English language arts

Grade 370%

School 70% · District 58% · ▲ 12 pts above district

▲ 18 pts above state median · ▲ 3 pts above county median

Grade 460%

School 60% · District 59% · ▲ 1 pts above district

▲ 7 pts above state median · ▼ 8 pts below county median

Science

Grade 486%

School 86% · district not reported

even with state median · ▼ 11 pts below county median

This schoolFREEPORT UNION FREE SCHOOL DISTRICT, same grade

Graduation rate (ACGR) reflects the federally published Adjusted Cohort Graduation Rate for the most recent year available. We refresh this data annually at the close of each academic year in June. The federal source publishes a banded rate (for example, "90-94%") instead of an exact number for cohorts small enough to risk identifying individual students. The state distribution chart, where shown, plots every school in the state with a published rate or band; schools whose rate is federally suppressed are excluded. Where the federal source publishes a band rather than an exact rate, the school is placed within its band using a stable, ID-derived offset, so its position is consistent across visits.

Proficiency by household income

English language arts

Grade 3Lower-income68%Higher-income75%7 pp gap

Grade 4Lower-income55%Higher-income69%13 pp gap

Mathematics

Grade 3Lower-income65%Higher-income76%11 pp gap

Grade 4Lower-income74%Higher-income83%9 pp gap