Summary
Plymouth South High is a public comprehensive high school serving grades 9–12 in the coastal town of Plymouth, Massachusetts, with about 1,001 students. It is part of the Plymouth district and ranked 226th of 353 Massachusetts high schools in 2025–2026 (36th percentile, 2 stars), while the district as a whole ranked 182nd of 351 (48th percentile). Its history shows a steep slide followed by a partial rebound: it sat near the state median at the 60th percentile in 2021–2022, fell to the 28th percentile in 2023–2024, and has since recovered to the 36th percentile — still below the district and state midpoint.
Academics are the main concern. On 2025–2026 10th-grade MCAS, Plymouth South High came in below both district and state in every core subject, with math the biggest gap: 27.31% proficiency versus 31.14% district and 43.73% statewide, more than 16 points behind the state. Science and Biology also lag the state by roughly 11–12 points, while ELA is closer, about 3 points below. Nearby, Plymouth North High, the district's other comprehensive high school, outperforms South in every subject and ranks higher (51st percentile). Duxbury High, Silver Lake Regional High, Bourne High School, Rising Tide Charter Public School, and Carver Middle/High School also rank above South, while South beats Wareham Senior High, Upper Cape Cod Vocational Technical, and Map Academy Charter School on several measures.
Where Plymouth South shines is completion: a 97.2% graduation rate and 2.4% dropout rate in 2024–2025, better than Plymouth North (91.7% and 6.9%) and most peers. Subgroup results have improved markedly — low-income students rose from the 11th to the 54th percentile and special education students from the 25th to the 52nd percentile in school-effectiveness rankings, both now above the state median, though male students trail female students. Per-student spending ($17,072) is lower than most neighbors, but the student-teacher ratio (10.1) is reasonable. In short: strong on getting students to graduation, weaker on test proficiency, especially in math and science.
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