Stone Mill Elementary
Wootton cluster · 14323 Stonebridge View Dr, 20878
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Academics
MCAP proficiency over time. Privacy-suppressed years break the line.
Data table
| Series | 2019 | 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|---|---|
| ELA | 83.1% | 51.7% | 80.1% | 82.9% | 79.3% | 73.6% |
| Math | 77.4% | 54.1% | 69.3% | 71.7% | 74.4% | 74.1% |
| Science | 69.6% | 72.1% | — | — | — | — |
2020 paused; general Science is 2019 & 2021 only.
Class size
Average class size by grade band over recent years, with the latest year measured against MCPS's published guideline.
Data table
| Series | 2022-2023 | 2023-2024 | 2024-2025 |
|---|---|---|---|
| Kindergarten | 22.3 * | 20.5 | 26.3 |
| Grades 1 to 3 | 23.7 * | 23.1 | 23.5 |
| Grades 4 to 5 | 24.0 * | 26.2 | 25.1 |
- Kindergarten 26.3 target 25 · over guideline
- Grades 1 to 3 23.5 target 26–27 · within guideline
- Grades 4 to 5 25.1 target 29 · 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.
7 groups not shown — too few students to report (withheld for privacy, not zero).
Special education
A priority lens: how students with disabilities are served, and the gap to close.
Data table
| Series | 2023 | 2024 | 2025 |
|---|---|---|---|
| Inclusion % | 62.2% | 66.7% | 65.9% |
Inclusion (Least Restrictive Environment) is the latest year; staffing is from 2025. Higher inclusion and a lower caseload generally point to more individualized support.
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 elementary 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.
Academics
Special Education
Source: MCPS Office of Student Affairs program catalog (2025). Find schools by program →
Students
Data table
| Series | 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|---|
| Enrollment | 521 | 542 | 550 | 534 | 516 |
By race / ethnicity (2025).
Climate
Attendance and chronic absenteeism (absent 10%+ of days).
Data table
| Series | 2019 | 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|---|---|
| Attendance | — | — | — | 94.8% | — | — |
| Chronic absenteeism | 6.8% | — | 9.2% | 11.2% | 8.2% | 12.2% |
Data: MSDE State Report Card (2019–2025), 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.