Seneca Valley High
Seneca Valley cluster · 19401 Crystal Rock Dr, 20874
School website ↗·Seneca Valley HS PTSA ↗
Academics
MCAP proficiency over time.
Data table
| Series | 2019 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
|---|---|---|---|---|---|---|---|
| ELA | 36.3% | 53.2% | 49.5% | 47.2% | 50% | 59.3% | 56.5% |
| Math | ≤5% | ≤5% | ≤5% | ≤5% | ≤5% | ≤5% | ≤5% |
| Science | 21.9% | 46.6% | 31.3% | 29.4% | 35.4% | 44.1% | — |
Testing paused in 2020. A dashed line in a shaded band means the exact value is suppressed for privacy — it is ≤5%. Science scoring changed twice (2019 pre-MCAP scale; 2021 three bands, two pooled administrations; four bands from 2022), so science points before 2022 aren't comparable to later ones. Science swung sharply statewide between 2023 and 2026 (down, then back up, one grade at a time); those moves likely reflect the state assessment, not school-level change. High-school science isn’t published for 2026 yet. 2019 math reflects the larger PARCC-era Algebra 1 testing population and isn't comparable to later years.
Class size
Average class size by grade band over recent years, with the latest year measured against MCPS's published guideline.
Data table
| Series | 2017-2018 | 2018-2019 | 2019-2020 | 2020-2021 | 2021-2022 | 2022-2023 | 2023-2024 | 2024-2025 |
|---|---|---|---|---|---|---|---|---|
| English | 15.0 * | 11.0 * | 16.4 * | 13.5 * | 18.0 * | 18.8 * | 23.8 | 24.4 |
| Other | 16.2 * | 13.1 * | 16.9 * | 16.3 * | 19.1 * | 19.4 * | 21.8 | 20.7 |
- English24.4target 30 · within guideline
- Other20.7target 33 · within guideline
Source: MCPS School Profiles class-size extract vs. MCPS published class-size guidelines · Updated: 2024-2025
Proficiency by student group
This school's MCAP ELA proficiency by group (latest year). The spread is the opportunity gap.
4 groups not shown — too few students to report (withheld for privacy, not zero).
Special education
Data table
| Series | 2023 | 2024 | 2025 |
|---|---|---|---|
| Inclusion % | 67.9% | 66.2% | 66.9% |
Time in general education (2025): 80%+ of the day 66.9% · 40–79% ≤5% · under 40% 29.1%
Staffing rates are per 100 students with IEPs; staffing is from 2025. Withheld values reflect privacy suppression, not zero.
Source: MCPS School Profiles / unified facts (LRE, staffing, SWD enrollment) · Updated: inclusion 2025, staffing 2025
Staffing
Staff relative to enrollment. The chip compares this school to the typical high school at this level.
Special education & multilingual support
Source: MCPS unified facts — staff FTE per student (support services = instructional support staff)
Programs & services
Special, choice, and support programs offered at this school — from magnet and application programs to career pathways and special-education services.
Regional - Application
Academics
CTE
CTE and Regional - Application
Student Support
Special Education
Source: MCPS Office of Student Affairs program catalog (2025). Find schools by program →
Students
Data table
| Series | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
|---|---|---|---|---|---|---|
| Enrollment | 1,652 | 2,040 | 2,239 | 2,386 | 2,409 | 2,373 |
By race / ethnicity (2026).
Climate
Attendance and chronic absenteeism (absent 10%+ of days).
Data table
| Series | 2019 | 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|---|---|
| Attendance | 90.1% | 91.5% | 93.9% | 89.7% | 90% | 90.7% |
| Chronic absenteeism | 30.8% | 27.6% | 33.9% | 43.7% | 34.3% | 30.7% |
Enrollment & capacity outlook
A ten-year probabilistic enrollment forecast for this school, checked against its capacity. Part of the countywide capacity outlook, which explains the method and its track record.
Data table
| School year | Actual | Forecast (p10–p90) | MCPS projection |
|---|---|---|---|
| 2017–18 | 1187 | — | — |
| 2018–19 | 1181 | — | — |
| 2019–20 | 1226 | — | — |
| 2020–21 | 1652 | — | — |
| 2021–22 | 2040 | — | — |
| 2022–23 | 2239 | — | — |
| 2023–24 | 2385 | — | — |
| 2024–25 | 2409 | — | — |
| 2025–26 | 2373 | — | — |
| 2026–27 | — | 2254 (2061–2440) | 2320 |
| 2027–28 | — | 2270 (1982–2569) | 2357 |
| 2028–29 | — | 2327 (1982–2733) | 2364 |
| 2029–30 | — | 2317 (1924–2809) | 2390 |
| 2030–31 | — | 2383 (1954–2973) | 2372 |
| 2031–32 | — | 2372 (1879–3051) | — |
| 2032–33 | — | 2360 (1842–3095) | — |
| 2033–34 | — | 2339 (1795–3165) | — |
| 2034–35 | — | 2332 (1738–3235) | — |
| 2035–36 | — | 2327 (1682–3297) | — |
- Includes the board-adopted boundary change effective SY 2027–28. Because this school hosts a large countywide program, its figures follow the board's adopted projection rather than a boundary ratio.
- Approved development near this school is expected to add roughly 77 students within five years (probability-weighted; approval does not guarantee construction).
Source: mc-development forecast model — base year SY 2025–26; boundaries 2024-2025; development snapshot 2026-06-02 · Updated: 2026-07-31T00:00:00Z
Data: MSDE State Report Card (2019–2026), MCPS official Sept 30, 2025 enrollment count (extends the enrollment trend to 2025-26), MCPS School Profiles & unified facts, U.S. Census ACS 2024, MD SDAT. “≥95” / “≤5” and dropped groups are privacy-suppressed for small counts — withheld, not zero. Independent project, not affiliated with MCPS or MSDE.