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SCHOOL COMMUNITY·ANNE ARUNDEL COUNTY PUBLIC SCHOOLS·NCES 240006000108

Old Mill Middle South

430 Old Mill Road, Millersville, MD 21108 · (410) 969-7000 · Anne Arundel County
GRADES 06–08MIDDLE21-SUBURBTITLE IREGULAR SCHOOL1,173 STUDENTS
B+
allk12 Grade
Scored higher than 67% of Maryland public middle schools
  • B-Test scores Share of students meeting the state standard in reading, math, and other tested subjects, 2023-24 and 2024-25.
  • B+Beats expectations How far test scores land above or below what the share of low-income students predicts for a school in this state.
  • ·Three-year trend Not available for this school, so the grade uses the other parts.

Grades compare a school only with schools in the same state, because every state gives its own test. How grades work · Top-graded Maryland public middle schools

Enrollment
1,173
Middle
DISTRICT 938 · STATE 764
Student : Teacher
15.0:1
78 FTE teachers
DISTRICT 13.6:1 · STATE 14.3:1
Free / Reduced Lunch
57%
674 students
DISTRICT 46% · STATE 54%
Community
5
0 members
Enrollment and student:teacher ratio compared against other middle schools. Free/Reduced Lunch and demographics compared against all schools.

Enrollment by grade, 2024-25

GradeStudentsShare
Grade 639534%
Grade 736831%
Grade 841035%
Student demographics
72%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 70% · STATE 73% · US 70%
White
32828%
DISTRICT 44% · STATE 31% · US 43%
Hispanic
24020%
DISTRICT 22% · STATE 24% · US 30%
Black
45539%
DISTRICT 22% · STATE 32% · US 15%
Asian
555%
DISTRICT 4% · STATE 7% · US 6%
Two+
888%
DISTRICT 7% · STATE 5% · US 5%
Native American
20%
DISTRICT 0% · STATE 0% · US 1%
Pacific Islander
40%
DISTRICT 0% · STATE 0% · US 0%
Student head counts by race/ethnicity from federal NCES enrollment data. District, state, and US figures are each group's share of all public school students in that area (US excludes territories). Very small groups may be suppressed in the source, so categories do not always sum exactly to total enrollment.
Gender split
Male
61953%
Female
55347%

Discussions

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Test scores

MCAP 2024-25 . % Proficient (Levels 3-4)
English Language Arts
45.5%
MD avg 50.6% . -8.4pp since 2023
Math
23.8%
MD avg 34.8% . -3.2pp since 2023

What this means: On the MCAP, Maryland's statewide test, about 46 of every 100 students at this school read and write at grade level and about 24 of 100 do math at grade level. Across all Maryland schools, those numbers are about 51 and 35. Reading and writing scores are down about 8 points since 2023, while math scores are down about 3 points.

MCAP results by year

School yearEnglish Language ArtsMath
2024-2545.5%23.8%
2023-2453.9%27.0%
% Proficient (Levels 3-4), all students and all tested grades.
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
37.5%
composite math + reading, all grades
Predicted
40.2%
based on MD schools with similar FRL share
Beats by
-2.7pp
below demographic expectation

What this means: About 38% of students here test proficient in math and reading, compared with the roughly 40% typical for Maryland schools with a similar share of low-income students. BeatsExpectations measures results against demographically similar schools rather than by raw scores, and this school falls within the typical range, neither among Maryland's top nor bottom 10%.

BeatsExpectations runs a per-state regression of proficiency on free/reduced-lunch share, then scores each school by residual. How this is calculated →

Schools most like Old Mill Middle South

Old Mill Middle South's state test result (37.5% proficient) is higher than 5 of the 5 schools below with a result.

SchoolStudentsLow-incomeProficient
Old Mill Middle South this school1,17357.5%37.5%
Bennett Middle
Fruitland
96359.3%28.6%
Franklin Middle
Reisterstown
1,15057.4%22.4%
Aberdeen Middle
Aberdeen
1,07161.4%29.6%
Lindale Middle
Linthicum
88456.9%28.7%
Spring Ridge Middle
Lexington Park
91363.7%31.8%
Matched among Maryland middle schools on enrollment, the share of students from low-income families (eligible for free or reduced-price lunch), and racial and ethnic makeup. Proficient is the average share of students meeting the state standard across all of the school's state tests in 2023-24 and 2024-25, the same combined score our test-score rankings use. Online schools and schools serving specialized populations are not matched.

Where Old Mill Middle South ranks

Among middle schools
MeasureThis schoolIn MarylandIn Anne Arundel County
State test proficiency
ranked highest first
37.5%#105 of 223#9 of 19
Math proficiency
ranked highest first
23.8%#114 of 223
▼ 33
#9 of 19
▼ 1
Reading proficiency
ranked highest first
45.5%#131 of 223
▼ 46
#10 of 19
▼ 2
Enrollment
ranked largest first
1,173#17 of 230#5 of 19
Students per teacher
ranked fewest first
15.0:1#131 of 225#15 of 19
Diversity index
ranked most diverse first
72.1%#36 of 225#5 of 19
Free and reduced lunch
ranked highest share first
57.5%#86 of 227#6 of 19
Enrollment change since 2017-18
ranked fastest growth first
+34.8%#9 of 95#1 of 10
Ranked against other public middle schools. Online schools are left out of every list, and test-score lists leave out schools that serve specialized populations. Each rank links to the full list. Arrows under a test-score rank show places moved since the prior test year, among schools tested both years.

4-year change

SY 2020-21 vs SY 2024-25
Enrollment
1,173
+155 (+15%) vs 2020
+50% since 1990-91, when it was 781
Student : Teacher
15.0:1
was 13.9:1
Source: NCES Common Core of Data

Enrollment and staffing by year

School yearStudentsTeachers (FTE)Students per teacherFree and reduced lunch
2024-251,1737815.0:157% (674)
2023-249637313.2:139% (371)
2022-2397973.513.3:143% (425)
2020-211,0187313.9:137% (380)
2017-1887064.513.5:127% (237)
2015-168426213.6:128% (233)
2010-117024914.3:127% (187)
2000-019204719.6:114% (126)
1990-917814318.2:1N/A
Source: NCES Common Core of Data. Rows are the federal collections on file for Old Mill Middle South.

Since 2017-18: students up 35% (870 to 1,173); teachers up 21% (64.5 to 78).

About Old Mill Middle South

Old Mill Middle South is a large middle school for students in Millersville, Maryland. Its 1,173 students are spread across grades 6 through 8. The typical figure for middle schools in Maryland is about 764 students.

Old Mill Middle South is among 125 schools run by Anne Arundel County Public Schools, which serves 85,029 students.

No single group makes up more than half of enrollment at Old Mill Middle South. The largest is Black students, at 39%. Smaller groups are 28% White, 20% Hispanic, 8% multiracial, and 5% Asian. For comparison, the population of Anne Arundel County is roughly 18% Black. The school's diversity index is 72%, meaning two students picked at random have a 72% chance of belonging to different racial or ethnic groups.

Staffing totals 78 full-time-equivalent teachers, and the student-to-teacher ratio is 15.0:1. On average, middle schools in Maryland have 14.3:1, compared with 15.0:1 here. The free or reduced-price lunch rate at Old Mill Middle South is 57%. That is 15 points above the 42% average for public schools in Anne Arundel County.

Measured against Maryland public middle schools, Old Mill Middle South receives a B+. The grade weighs proficiency most heavily, then how results compare with what the school's low-income share predicts, then the three-year change.

The model predicts 40.2% for a school in Maryland with Old Mill Middle South's free or reduced-price lunch share. Old Mill Middle South posts 37.5%.

County data help place the school in context: in Anne Arundel County, the median household income is $124,911, the share of adults with a bachelor's degree or higher is 46%, and about 4% of people live in poverty. In all, Anne Arundel County has 129 public schools and roughly 85,074 students.

Southgate Elementary is located about 0.5 miles from Old Mill Middle South. Around the school, at least 8 other public schools are within five miles. On proficiency, Old Mill Middle South is behind the 40.5% nearby average, ranking 2nd of 7.

The NCES locale for Old Mill Middle South is Suburb: Large, which covers schools in a suburban area outside a principal city, within an urbanized area with a population of 250,000 or more.

Old Mill Middle South's enrollment climbed from 1,018 in 2020-21 to 1,173 in 2024-25. Students per teacher rose from 13.9 in 2020-21 to 15.0 in 2024-25.

The discussion area below is open to posts about sports schedules, lunch menus, and spirit week. Reviews and ratings from people who know the school are welcome.

Anne Arundel County at a glance

View full county profile
Population
598,166
Census ACS
Median income
$124,911
Household, ACS
Bachelor's+
46%
Adults 25+
Poverty rate
4%
Below federal line
Schools in county
129
85,074 students

Quick facts

School name
Old Mill Middle South
District
Anne Arundel County Public Schools
Address
430 Old Mill Road, Millersville, MD 21108
Phone
(410) 969-7000
County
Anne Arundel County
Level
Middle
Grade range
06–08
Total enrollment
1,173
Teachers (FTE)
78
Student–teacher ratio
15.0:1
Free and reduced lunch
674 (57%)
Locale
21-Suburb: Large
NCES ID
240006000108
Charter school
No
Virtual school
No

Related schools

Other schools in Anne Arundel County Public Schools
Other schools in Millersville
Nearby schools

Frequently asked questions

About Old Mill Middle South
How many students attend Old Mill Middle South?
Old Mill Middle South enrolls approximately 1,173 students in grades 06-08.
Is Old Mill Middle South an elementary, middle, or high school?
Old Mill Middle South is a middle school covering grades 06-08.
How many students per teacher at Old Mill Middle South?
Approximately 15.0:1 students per teacher at Old Mill Middle South.
What is the racial breakdown of students at Old Mill Middle South?
At Old Mill Middle South, the student body is approximately 28% White, 20% Hispanic, 39% Black, 5% Asian, 8% Two or more.
Is Old Mill Middle South public or private?
Old Mill Middle South is a public K-12 school, overseen by Anne Arundel County Public Schools.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.
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