Diamond Elementary
Northwest, Quince Orchard cluster · 4 Marquis Dr, 20878
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Academics
MCAP proficiency over time.
Data table
| Series | 2019 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 |
|---|---|---|---|---|---|---|---|
| ELA | 76.3% | 51.8% | 79.7% | 79.1% | 81.5% | 73.7% | 76.4% |
| Math | 74.8% | 45.4% | 63.3% | 64% | 71.8% | 70.3% | 70.9% |
| Science | 58.3% | 66.1% | 71.4% | 62% | 47.3% | 54.3% | 63.9% |
Testing paused in 2020. 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.
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 |
|---|---|---|---|---|---|---|---|---|
| Kindergarten | 22.8 * | 23.2 * | 23.7 * | 20.0 * | 17.8 * | 18.2 * | 22.0 | 24.0 |
| Grades 1 to 3 | 23.7 * | 25.0 * | 23.4 * | 19.6 * | 17.8 * | 18.7 * | 20.4 | 20.4 |
| Grades 4 to 5 | 24.2 * | 23.3 * | 24.2 * | 19.5 * | 16.6 * | 19.5 * | 20.3 | 21.1 |
- Kindergarten24target 25 · within guideline
- Grades 1 to 320.4target 26–27 · within guideline
- Grades 4 to 521.1target 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.
5 groups not shown — too few students to report (withheld for privacy, not zero).
Special education
Data table
| Series | 2023 | 2024 | 2025 |
|---|---|---|---|
| Inclusion % | 72.2% | 74.3% | 66.3% |
Time in general education (2025): 80%+ of the day 68.7% · 40–79% 31.3% · under 40% ≤5%
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 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 | 2026 |
|---|---|---|---|---|---|---|
| Enrollment | 780 | 732 | 676 | 653 | 654 | 659 |
By race / ethnicity (2026).
Climate
Attendance and chronic absenteeism (absent 10%+ of days).
Data table
| Series | 2019 | 2021 | 2022 | 2023 | 2024 | 2025 |
|---|---|---|---|---|---|---|
| Attendance | ≥ 95.0 | ≥ 95.0 | 94.5% | 92.9% | 93.6% | 94.4% |
| Chronic absenteeism | 10.7% | 5.1% | 19.8% | 26.7% | 16.6% | 12.8% |
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 | 738 | — | — |
| 2018–19 | 770 | — | — |
| 2019–20 | 791 | — | — |
| 2020–21 | 780 | — | — |
| 2021–22 | 732 | — | — |
| 2022–23 | 676 | — | — |
| 2023–24 | 653 | — | — |
| 2024–25 | 654 | — | — |
| 2025–26 | 659 | — | — |
| 2026–27 | — | 626 (588–671) | 645 |
| 2027–28 | — | 628 (572–691) | 629 |
| 2028–29 | — | 613 (545–689) | 631 |
| 2029–30 | — | 611 (535–700) | 612 |
| 2030–31 | — | 594 (515–688) | 610 |
| 2031–32 | — | 592 (512–693) | — |
| 2032–33 | — | 591 (506–681) | — |
| 2033–34 | — | 587 (507–675) | — |
| 2034–35 | — | 586 (506–678) | — |
| 2035–36 | — | 589 (506–678) | — |
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.