The bulletin board for America's public schools. Parents, teachers, students, and staff. One community per school.
SCHOOL COMMUNITY·WASHINGTON COUNTY PUBLIC SCHOOLS·NCES 240066001268

Greenbrier Elementary

21222 San Mar Rd, Boonsboro, MD 21713 · (301) 766-8170 · Washington County
GRADES PK–05ELEMENTARY41-RURALREGULAR SCHOOL259 STUDENTS
Enrollment
259
Elementary
DISTRICT 433 · STATE 481
Student : Teacher
16.1:1
16 FTE teachers
DISTRICT 15.1:1 · STATE 13.8:1
Free / Reduced Lunch
39%
101 students
DISTRICT 56% · STATE 54%
Community
0
0 members
Enrollment and student:teacher ratio compared against other elementary schools. Free/Reduced Lunch and demographics compared against all schools.
Enrollment by grade
Pre-K
38
Kindergarten
31
Grade 1
37
Grade 2
36
Grade 3
36
Grade 4
42
Grade 5
39
Student demographics
White
20278%
DISTRICT 54% · STATE 31%
Hispanic
2710%
DISTRICT 18% · STATE 24%
Black
62%
DISTRICT 16% · STATE 32%
Asian
73%
DISTRICT 2% · STATE 7%
Two+
166%
DISTRICT 9% · STATE 5%
Native American
10%
DISTRICT 0% · STATE 0%
Student head counts by race/ethnicity from federal NCES enrollment data. Very small groups may be suppressed in the source, so categories do not always sum exactly to total enrollment.
Gender split
Male
12649%
Female
13351%

Discussions

+ POST
QUIET COMMUNITY
Be the first to start a discussion at Greenbrier Elementary.
START A DISCUSSION
Recent discussions in Washington County Public Schools

Test scores

MCAP 2024-25 . % Proficient (Levels 3-4)
English Language Arts
63.9%
MD avg 50.6% . +7.6pp since 2023
Math
44.5%
MD avg 34.8% . -9.3pp since 2023
Source: MCAP. All students, all grades. See all years and grades →

BeatsExpectations

Demographically-adjusted score · methodology
Tier
AS EXPECTED
Performing as predicted given the school's student profile
Actual proficiency
54.6%
composite math + reading, all grades
Predicted
51.1%
based on MD schools with similar FRL share
Beats by
+3.5pp
above demographic expectation
BeatsExpectations runs a per-state regression of proficiency on free/reduced-lunch share, then scores each school by residual. How this is calculated →

7-year change

SY 2017-18 vs SY 2024-25
Enrollment
259
+37 (+17%) vs 2017
Student : Teacher
16.1:1
was 15.1:1
% White
78%
was 82%
% Hispanic
10%
was 5%
% Black
2%
was 5%
% Asian
3%
was 5%
Source: NCES Common Core of Data

About Greenbrier Elementary

As an intimate elementary-level community in Boonsboro, Maryland, Greenbrier Elementary hosts 259 students from grades pre-K through 5, one of the schools within Washington County Public Schools. By comparison, Maryland's public schools average about 481 students each, so Greenbrier Elementary sits 46% smaller than that benchmark.

Within Washington County Public Schools, which oversees 43 schools and 23,320 students, Greenbrier Elementary is one campus in the system.

For racial and ethnic makeup, Greenbrier Elementary reports that 78% of the student body identifies as White. Other groups include 10% Hispanic, 6% multiracial, 3% Asian, 2% Black. That mix tracks the wider county fairly closely.

Looking at the economic backdrop, The school reports having 16 full-time-equivalent teachers, for a student-teacher ratio near 16.1:1. That figure is higher than the state norm's 13.8:1 average. Around 39% of the student body qualifies for free or reduced-price meals, often used as a Title I proxy. By comparison, Washington County runs at roughly 58%, so the school's eligibility rate is meaningfully below the surrounding baseline.

On a residual basis (actual vs predicted given the student mix), Greenbrier Elementary performs roughly as the BeatsExpectations model predicts for a school with this FRL share. The predicted value is around 51.1%, the actual is 54.6%, a residual of +3.5 points.

In the area at large, census data for Washington County shows median household earnings sit near $77,747, roughly 24% of adults have completed at least a four-year degree, and the poverty rate sits near 9%. Greenbrier Elementary is one of 44 public schools in Washington County (combined enrollment of about 23,320 students).

The closest other public school is Boonsboro Middle, roughly 3.0 miles away. Within five miles, there are 5 other public schools. On composite proficiency, Greenbrier Elementary comes 5th of 8 in the immediate cluster, beneath the nearby-schools average of 57.9%.

Greenbrier Elementary operates from a rural location.

Five-year trend. Over the past 7-year window, the student count rose 17%: 222 students in 2018 compared to 259 in 2025. Hispanic enrollment moved from 5% to 10% across the same window. The student-to-teacher ratio loosened from 15.1:1 in 2018 to 16.1:1 today.

Inside the community feed, posts here usually surface around fundraisers, lost-and-found posts, and report-card season. Contributors range from current parents to recent graduates and teachers.

Washington County at a glance

View full county profile
Population
155,709
Census ACS
Median income
$77,747
Household, ACS
Bachelor's+
24%
Adults 25+
Poverty rate
9%
Below federal line
Schools in county
44
23,320 students

Quick facts

School name
Greenbrier Elementary
District
Washington County Public Schools
Address
21222 San Mar Rd, Boonsboro, MD 21713
Phone
(301) 766-8170
County
Washington County
Level
Elementary
Grade range
PK–05
Total enrollment
259
Teachers (FTE)
16
Student–teacher ratio
16.1:1
Free/Reduced lunch
101 (39%)
Locale
41-Rural: Fringe
NCES ID
240066001268
Charter school
No
Virtual school
No

Related schools

Other schools in Washington County Public Schools
Other schools in Boonsboro
Nearby schools

Frequently asked questions

About Greenbrier Elementary
How many students attend Greenbrier Elementary?
Greenbrier Elementary enrolls approximately 259 students in grades PK-05.
What age range does Greenbrier Elementary serve?
Greenbrier Elementary serves students from grade PK through grade 05.
What is the student-teacher ratio at Greenbrier Elementary?
The student-to-teacher ratio at Greenbrier Elementary is approximately 16.1:1 (16 FTE teachers).
What is the racial breakdown of students at Greenbrier Elementary?
At Greenbrier Elementary, the student body is approximately 78% White, 10% Hispanic, 2% Black, 3% Asian, 6% Two or more.
Is Greenbrier Elementary public or private?
Greenbrier Elementary is a public K-12 school, overseen by Washington County Public Schools.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.
+ Post