Plainedge Senior High School, Massapequa NY

Original Research by School Decision on Plainedge Senior High School

Plainedge Senior High School is a grades 9-12 public school of around eight hundred students located in Massapequa, serving the North Massapequa portion of Nassau County. The school sits in the Plainedge Union Free School District, a separate district from Massapequa Union Free (the districts are adjacent and the geographic boundary can be confusing for families new to the area).

The student body is predominantly white, with smaller shares of Hispanic, Asian, and other backgrounds. A modest share of students qualify for free or reduced-price lunch, suggesting the school draws from a community with generally stable household incomes, though with some economic diversity. State assessment data for this school was not available, nor was a graduation rate or chronic absenteeism figures, so a parent looking for those metrics would need to request them directly from the school or check what the district publishes separately. The absence of those figures is common at the individual school level in New York when state reporting focuses on district-wide aggregate results.

Plainedge sits in a built-out post-World War II suburban landscape of single-family homes, tree-lined streets, and established neighborhoods. The Massapequa Preserve, one of Nassau County's largest parks, anchors outdoor life in the area, and the LIRR Massapequa station on the Babylon Branch puts New York City roughly an hour away. The neighboring Village of Massapequa Park has a walkable downtown with local shops and restaurants, though the wider area is car-oriented. Housing values in the zip code are solid and have held relatively stable; the market has moderate supply and modest buyer demand as of early 2026.

The community and district context matters here. Plainedge approved a substantial capital improvements plan and reserve fund in May 2026 for building upgrades over the next five years, with work planned on windows, HVAC, science rooms, security, gymnasium, and other systems. This signals the district is investing in its physical plant, which affects the school environment families will encounter. The district also introduced a free full-day universal pre-kindergarten program for four-year-olds, funded by a New York State grant, which is relevant for families with younger siblings. Both moves reflect a district engaged in long-term planning and willing to ask voters to support capital spending, though they also carried a tax levy increase.

For a parent considering this school, the picture is of a mid-sized high school in a stable, family-oriented suburban neighborhood with active community ties and district-wide facility investment underway. Without state test scores, graduation data, or program details in the available information, a parent would want to visit the school, ask about course offerings (AP, honors, career pathways), talk to current families, and request the district's assessment results and graduation rates directly. The school's enrollment is steady across grade levels, suggesting stable operations rather than sharp enrollment change.

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Academic performance

How students graduate and prepare for what comes next.

Graduation rate (ACGR)

98.0%Cohort of 244 students · Class of 2021

How this school compares to all schools in this state

Each dot is one school’s SY 2020-21 graduation rate, binned by integer rate. Taller columns mean more schools at that rate. This school is highlighted.

1,253 schools plotted. 14 additional schools' rates are federally suppressed and not shown. Data: EDFacts SY 2020-21.

Advanced Placement & IB

20 subjects offered · 2023-24

Each card is one AP or IB subject. The headline number is the share of students scoring 3 or higher on the exam — the threshold for college credit at most universities. The bar below each rate shows the underlying distribution across performance levels.

Score:12· no credit345· extremely well qualified

Math and Computer Science

Calculus AB

9 tested

77.8%

scored 3 or higher

Calculus BC

15 tested

53.3%

scored 3 or higher

Computer Science Principles

17 tested · Grade 9, Grade 10

29.4%

scored 3 or higher

Statistics

1 tested

0.0%

scored 3 or higher

Sciences

Biology

31 tested

90.3%

scored 3 or higher

Chemistry

20 tested

90.0%

scored 3 or higher

Physics 1

22 tested

27.3%

scored 3 or higher

Physics 2

21 tested

38.1%

scored 3 or higher

English

Research

8 tested

0.0%

scored 3 or higher

Seminar

11 tested · Grade 10

54.5%

scored 3 or higher

History and Social Sciences

Macroeconomics

18 tested

94.4%

scored 3 or higher

Psychology

25 tested

80.0%

scored 3 or higher

U.S. History

48 tested

97.9%

scored 3 or higher

World Languages and Cultures

Spanish Language and Culture

22 tested

86.4%

scored 3 or higher

Arts

Music Theory

13 tested

23.1%

scored 3 or higher

Other

Language and Comp

79 tested

60.8%

scored 3 or higher

Literature and Comp

8 tested

100.0%

scored 3 or higher

Studio Art 2d Design

8 tested

75.0%

scored 3 or higher

U S Government and Politics

17 tested

100.0%

scored 3 or higher

World History

39 tested · Grade 10

89.7%

scored 3 or higher

New York Regents Exams

4 courses reported · 2024-25

End-of-course exams required for a New York Regents diploma. Each row shows the cohort size and the share of students scoring at the proficient level or higher.

Course	Students tested	% proficient
Social Studies	235	85.0%
Ela	210	94.0%
Math	179	95.0%
Science	119	61.0%

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.