Enrollment
685
Maryland · 2024-25 NCES data
Middle school (grades 6-8) · Silver Spring, MD
Sligo Middle
Federal NCES profile for Sligo Middle, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 59/100.
2024-25 NCES dataMiddle school (grades 6-8)NCES 240048001458
👥 S:T ratio 47
🌟 Gifted program 70
🎓 Counselors 61
📋 Attendance 57
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Sligo Middle earns 59/100 on the Resource Investment Index, with class sizes near the Maryland median.
- #1 of 10
- middle schools in Silver Spring · Resource Index
- 59
- Resource Index · Higher
- 13.2:1
- students per teacher
- 47.0%
- free-lunch eligible
Sligo Middle has class sizes near the Maryland median. Computed live against every Maryland school reporting to NCES.
By Resource Investment Index, Sligo Middle ranks #1 of 10 middle schools in Silver Spring, MD.
School address
District: Montgomery County Public Schools · Maryland
NCES ID 240048001458 Verify on NCES CCD record →
Teachers (FTE)
52.0
Federal CCD staff survey
Students per teacher
13.2:1
vs 14.5:1 Maryland avg
-9% vs state
Free-lunch eligible
47.0%
vs 49.0% Maryland avg
-4% vs state
Student-teacher ratio in context
How Sligo Middle compares with Maryland and U.S. medians
What stands out at Sligo Middle
Sligo Middle is a mid-sized middle school in Silver Spring, Maryland, enrolling 685 students.
Class sizes run a bit leaner than typical: 13.2:1 puts it in the smaller third of Maryland schools by student-teacher ratio.
Its free-meal eligibility rate of 47.0% lands close to the Maryland typical range, neither a high- nor low-need campus by this measure.
Enrollment of 685 puts it in the larger third of Maryland schools by headcount.
Its Resource Investment Index outscores 97% of the 1,382 Maryland schools with a score on record, a top-tier result on this measure.
Among 298 similarly sized, similarly resourced-need Maryland schools statewide, it ranks #2, a top-tier result once campus size and economic need are matched.
Its student body is led by Hispanic or Latino (42%) and White (28%) (diversity index 70/100).
Counselor coverage is strong, about 196 students per counselor, inside the American School Counselor Association's recommended 250:1.
17.1% of students were chronically absent in the 2021-22 collection, in line with the post-pandemic national range.
Among Silver Spring's middle schools, it stands alongside Takoma Park Middle (1,177 students): Sligo Middle is smaller than that campus by headcount and runs leaner classes (13.2:1 vs 17.3:1).
Montgomery County Public Schools also operates Montgomery Blair High (3,266 students) and Walter Johnson High (3,016 students) alongside Sligo Middle.
Sourced from NCES CCD, CRDC, and F-33 (federal records, not a quality verdict). How we source and compute this.
Source: National Center for Education Statistics Common Core of Data + CRDC + F-33 · 2024-25
How Sligo Middle compares
Sligo Middle on the metrics families compare, against Maryland and U.S. means.
| Metric | This school | vs Maryland | Maryland avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 13.2:1 | ▼ 9% | 14.5:1 | 15.7:1 |
| Free-lunch eligible | 47.0% | ▼ 4% | 49.0% | 51.7% |
| Enrollment | 685 | top 31% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
13.2:1
Leaner classes than 65% of US schools, a middle-of-the-pack class size.
685
Bigger than 79% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Economic need
47.0%
free-lunch eligible
- 4% below the Maryland average of 49.0%
Above the 40% Title I schoolwide threshold; federal funds support the whole school, not individual students.
Staffing depth
13.2:1
students per teacher
- 9% below state mean
Top 32% in Maryland - lower ratio than 68% of state schools
Close to the 15:1 benchmark most often cited for individualized attention.
Engagement
17.1%
chronically absent (missed 10%+ of school days)
In the 15-20% range, nearing the "high" absenteeism threshold.
Funding equity
$18,101
per pupil, district-wide
- below Maryland avg of $20,446
Somewhat above the U.S. public-school average, reflecting higher local or state investment per enrolled student.
Support staff
Counselors3.5 FTE
Per 196 students, the combined health-and-guidance staffing load for this school.
Discipline context
1
in-school suspensions + 5 out-of-school
Suspension rate: 0.1 per 100 students. Combined in-school and out-of-school rate: 0.9 per 100 students. Reported via the Civil Rights Data Collection.
Overview
- Common Core of Data (June 2026): enrollment, staffing, and the student-teacher ratio above.
- Civil Rights Data Collection: discipline counts and program access (AP, gifted, special education).
- F-33 School District Finance Survey: the district-wide per-pupil spending figures below.
Three separate federal collections, each on its own reporting cadence - which is why this school's numbers line up on a consistent basis against every other school and state on this site, rather than mixing figures pulled from different survey years.
Student demographics
Hispanic or Latino 42.0%
White 27.6%
African American 19.6%
Two or More 5.6%
Asian 5.3%
Largest group: Hispanic or Latino at 42.0% of enrollment.
Student-body diversity index 70.3/100
Simpson diversity index - at 70.3, Sligo Middle is more mixed than the Maryland school average of 52.3.
Programs
Gifted & talented Yes
Funding & spending
District-wide per-pupil expenditure for Montgomery County Public Schools, which includes Sligo Middle.
$18,101
Per student
-11%
vs Maryland
Avg $20,446
+9%
vs U.S.
Avg $16,593
Revenue mix
Local 66.0%
State 23.7%
Federal 10.3%
Source: NCES F-33 School District Finance Survey District-level finance · FY 2021-22 Per-pupil expenditure reflects the district-wide average. Individual school budgets are not reported at the federal level.
How Sligo Middle Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Montgomery Blair High | Larger | Similar economic need | Higher S:T ratio |
| Walter Johnson High | Larger | Lower economic need | Higher S:T ratio |
| Wheaton High | Larger | Similar economic need | Higher S:T ratio |
| Gaithersburg High | Larger | Higher economic need | Similar S:T ratio |
| Seneca Valley High | Larger | Similar economic need | Higher S:T ratio |
Comparisons are relative to Sligo Middle's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 3,266
- Students per teacher
- 17:1
- Resource Index
- 52/100
- Enrollment
- 3,016
- Students per teacher
- 19.1:1
- Resource Index
- 51/100
- Enrollment
- 2,794
- Students per teacher
- 17.8:1
- Resource Index
- 43/100
- Enrollment
- 2,441
- Students per teacher
- 14.4:1
- Resource Index
- 56/100
- Enrollment
- 2,409
- Students per teacher
- 15.6:1
- Resource Index
- 41/100
Similar middle schools in Silver Spring
6 comparable middle schools (grades 6-8) serving the same city.
Takoma Park Middle
Standard public school
1,177 students 17.3:1 students per teacher
Silver Spring International Middle
Standard public school
1,015 students 12.8:1 students per teacher
A. Mario Loiederman Middle
Standard public school
978 students 13.4:1 students per teacher
Eastern Middle
Standard public school
963 students 13.6:1 students per teacher
Francis Scott Key Middle
Standard public school
950 students 14.6:1 students per teacher
Argyle Middle
Standard public school
868 students 13.6:1 students per teacher
Similar middle schools statewide
Matched by enrollment size and by staffing ratio across all of Maryland, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~685 students)
Next steps
Verify locally before acting on Sligo Middle's federal record.
- Compare Sligo Middle against another school. Compare schools
- Montgomery County Public Schools's spending and staffing shape this school. District profile
- Confirm current enrollment and boundaries with the school. Choosing guide
Federal record (CCD 2024-25, CRDC 2021-22) - PlainSchools assigns no subjective rating; the composite quality score is a transparent, reproducible index computed from this cited federal data.
Frequently asked questions about Sligo Middle
How many students attend Sligo Middle?
Sligo Middle has 685 students enrolled. It is a middle school in Silver Spring, MD.
What is the student-teacher ratio at Sligo Middle?
The student-teacher ratio at Sligo Middle is 13.2:1, which is 9% lower than the Maryland average of 14.5:1 and 16% lower than the national average of 15.7:1. Lower ratios generally mean more individual attention per student.
What percentage of students receive free lunch at Sligo Middle?
47.0% of students at Sligo Middle are eligible for free lunch, compared to the Maryland average of 49.0%.
What is the racial and ethnic makeup of Sligo Middle?
The largest demographic group at Sligo Middle is Hispanic or Latino at 42.0% of enrollment, in Silver Spring, MD. Its student body is more racially and ethnically mixed than most US schools, with a diversity index of 70.3/100.
What is the Resource Investment Index for Sligo Middle?
Sligo Middle has a Resource Investment Index of 59/100 (higher reported resources relative to schools nationally) based on 4 factors: student-teacher ratio, counselor availability, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Sligo Middle rank among middle schools in Silver Spring?
By Resource Investment Index, Sligo Middle ranks #1 of 10 middle schools in Silver Spring, MD. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all middle schools in Silver Spring on the city page.
Is Sligo Middle a good school?
Sligo Middle earns 59/100 on the Resource Investment Index, with class sizes near the Maryland median. This is a resource snapshot, not an academic rating; see the Resource Investment Index question above for what the number does and doesn't measure.
What other schools are in Montgomery County Public Schools?
Besides Sligo Middle, Montgomery County Public Schools also operates Montgomery Blair High (3,266 students), Walter Johnson High (3,016 students), and Wheaton High (2,794 students). See the Montgomery County Public Schools district page for the complete list.
Related tools
Every figure on PlainSchools is rendered directly from the source NCES, CRDC and F-33 federal records, no number is typed in by an editor. Each school's figures reflect its most recent NCES/CRDC submission on file. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of June 2026.