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How has Union Mill Elementary changed in the last five years, for better or worse?
Community prompt from u/allk12. Replies below.
Enrollment
874
Elementary
DISTRICT 630 · STATE 499
SCHOOL COMMUNITY·FAIRFAX COUNTY PUBLIC SCHOOLS·NCES 510126002060
Union Mill Elementary
13611 Springstone Dr, Clifton, VA 20124 · (703) 322-8500 · Fairfax County
GRADES PK–06ELEMENTARY21-SUBURBREGULAR SCHOOL874 STUDENTS
Student : Teacher
15.9:1
55 FTE teachers
DISTRICT 13.6:1 · STATE 13.8:1
Free / Reduced Lunch
12%
109 students
DISTRICT 39% · STATE 66%
Community
1
0 members
Enrollment and student:teacher ratio compared against other elementary schools. Free/Reduced Lunch and demographics compared against all schools.
Enrollment by grade, 2024-25
| Grade | Students | Share |
|---|---|---|
| Pre-K | 1 | 0% |
| Kindergarten | 98 | 11% |
| Grade 1 | 123 | 14% |
| Grade 2 | 141 | 16% |
| Grade 3 | 136 | 16% |
| Grade 4 | 117 | 13% |
| Grade 5 | 133 | 15% |
| Grade 6 | 125 | 14% |
This year's kindergarten class (98) is 22% smaller than its 6th grade class (125).
Student demographics
60%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 74% · STATE 71% · US 70%
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
Test scores
SOL 2024-25 . % PassingEnglish Language Arts
80.0%
VA avg 74.2% . -3.0pp since 2022
Math
87.0%
VA avg 72.7% . +3.0pp since 2022
What this means: On the SOL, Virginia's statewide test, about 80 of every 100 students at this school read and write at grade level and about 87 of 100 do math at grade level. Across all Virginia schools, those numbers are about 74 and 73. Reading and writing scores are down about 3 points since 2022, while math scores are up about 3 points.
SOL results by year
| School year | English Language Arts | Math |
|---|---|---|
| 2024-25 | 80.0% | 87.0% |
| 2023-24 | 83.0% | 85.0% |
| 2022-23 | 83.0% | 84.0% |
% Passing, all students and all tested grades.
Source: SOL. All students, all grades. See all years and grades →
BeatsExpectations
Demographically-adjusted score · methodologyTier
AS EXPECTED
Performing as predicted given the school's student profile
Actual proficiency
82.0%
composite math + reading, all grades
Predicted
84.7%
based on VA schools with similar FRL share
Beats by
-2.7pp
below demographic expectation
What this means: About 82% of students here test proficient in math and reading, compared with the roughly 85% typical for Virginia 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 Virginia'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 Union Mill Elementary
Union Mill Elementary's state test result (82.0% proficient) is higher than 0 of the 5 schools below with a result.
| School | Students | Low-income | Proficient |
|---|---|---|---|
| Union Mill Elementary this school | 874 | 12.5% | 82.0% |
| Oak View Elementary Fairfax | 776 | 11.0% | 84.5% |
| Hunt Valley Elementary Springfield | 735 | 11.7% | 86.8% |
| Cool Spring Elementary Mechanicsville | 852 | 13.8% | 83.9% |
| Silverbrook Elementary Fairfax Station | 799 | 8.1% | 88.8% |
| Sangster Elementary Springfield | 928 | 3.7% | 97.5% |
Matched among Virginia elementary 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 Union Mill Elementary ranks
Among elementary schools| Measure | This school | In Virginia | In Fairfax County |
|---|---|---|---|
| State test proficiency ranked highest first | 82.0% | #255 of 1,101 | #53 of 136 |
| Math proficiency ranked highest first | 87.0% | #192 of 1,111 ▲ 20 | #46 of 136 ▼ 3 |
| Reading proficiency ranked highest first | 80.0% | #322 of 1,111 ▼ 93 | #63 of 136 ▼ 7 |
| Enrollment ranked largest first | 874 | #44 of 1,176 | #13 of 144 |
| Students per teacher ranked fewest first | 15.9:1 | #912 of 1,105 | #126 of 143 |
| Diversity index ranked most diverse first | 60.0% | #566 of 1,106 | #102 of 143 |
| Free and reduced lunch ranked highest share first | 12.5% | #1,096 of 1,157 | #110 of 140 |
| Enrollment change since 2017-18 ranked steepest decline first | -8.9% | #498 of 759 | #68 of 110 |
Ranked against other public elementary 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 2024-25Enrollment
874
+28 (+3%) vs 2020
-7% since 1990-91, when it was 939
Student : Teacher
15.9:1
was 14.8:1
Source: NCES Common Core of Data
Enrollment and staffing by year
| School year | Students | Teachers (FTE) | Students per teacher | Free and reduced lunch |
|---|---|---|---|---|
| 2024-25 | 874 | 54.9 | 15.9:1 | 12% (109) |
| 2023-24 | 908 | 53.3 | 17.0:1 | 14% (131) |
| 2022-23 | 895 | 52.8 | 17.0:1 | 12% (110) |
| 2020-21 | 846 | 57 | 14.8:1 | N/A |
| 2017-18 | 959 | 52.7 | 18.2:1 | 13% (124) |
| 2015-16 | 936 | 53 | 17.7:1 | 9% (88) |
| 2010-11 | 746 | 34 | 21.9:1 | 2% (12) |
| 2000-01 | 733 | 43 | 17.1:1 | 0% (2) |
| 1990-91 | 939 | 47 | 20.0:1 | N/A |
Source: NCES Common Core of Data. Rows are the federal collections on file for Union Mill Elementary.
Since 2017-18: students down 9% (959 to 874); teachers up 4% (52.7 to 54.9).
About Union Mill Elementary
Union Mill Elementary is a high-enrollment elementary school with an address in Clifton, Virginia. Students in pre-K through 6 make up the school's enrollment of 874 students. By comparison, elementary schools in Virginia enroll about 499 students on average.
Fairfax County Public Schools is made up of 199 schools with 179,323 students in all.
White students are 59% of those enrolled at Union Mill Elementary. Other reported shares: 16% Asian, 11% Hispanic, 9% multiracial, and 5% Black. That compares with about 49% White among all Fairfax County residents. A diversity index of 60% means there is a 60% chance two randomly chosen students at Union Mill Elementary are from different groups.
Union Mill Elementary lists 54.9 full-time-equivalent teachers; that is about 15.9 students per teacher. Across elementary schools in Virginia, the average ratio is 13.8:1. Free or reduced-price lunch covers 12% of the student body. The 37% average for public schools in Fairfax County is 25 points higher.
BeatsExpectations compares each school's average proficiency rate across its state test results with a prediction based on free or reduced-price lunch eligibility. For Union Mill Elementary, the prediction is 84.7% and the result is 82.0%.
In the wider Fairfax County area, the median household earns about $153,637 a year, about 65% of adults have at least a bachelor's degree, and roughly 4% of residents are in poverty. Across Fairfax County, 222 public schools serve about 174,475 students.
Centreville High is about 0.5 miles from Union Mill Elementary, the shortest distance to any other public school. A five-mile radius around the school includes at least 8 other public schools. By average proficiency, Union Mill Elementary is 4th among 8 schools close by.
The National Center for Education Statistics classifies the school's location as Suburb: Large, meaning it is in a suburban area outside a principal city, within an urbanized area with a population of 250,000 or more.
In 2024-25, the school enrolled 874, up from 846 in 2020-21. The school's ratio increased from 14.8:1 to 15.9:1 between 2020-21 and 2024-25.
The Union Mill Elementary discussion page is a place for homework, tutoring, and testing dates. Teachers and staff are welcome to share updates too.
Fairfax County at a glance
View full county profilePopulation
1,147,837
Census ACS
Median income
$153,637
Household, ACS
Bachelor's+
65%
Adults 25+
Poverty rate
4%
Below federal line
Schools in county
222
174,475 students
Quick facts
Related schools
Other schools in Fairfax County Public Schools
- Lake Braddock SecondaryHigh · 4,411 students
- Robinson SecondaryHigh · 3,710 students
- Hayfield SecondaryHigh · 3,256 students
- Chantilly HighHigh · 2,937 students
- West Springfield HighHigh · 2,799 students
- Westfield HighHigh · 2,737 students
Other schools in Clifton
- Centreville HighHigh · 2,347 students
- Liberty MiddleMiddle · 913 students
Nearby schools
- Centreville High0.5 mi · 2,347
- Liberty Middle1.0 mi · 913
- Mountain View High1.2 mi · 145
- Centreville Elementary1.2 mi · 741
- Centre Ridge Elementary1.6 mi · 635
- Powell Elementary1.9 mi · 872
Frequently asked questions
About Union Mill ElementaryHow many students attend Union Mill Elementary?
Union Mill Elementary enrolls approximately 874 students in grades PK-06.
What age range does Union Mill Elementary serve?
Union Mill Elementary serves students from grade PK through grade 06.
What is the student-teacher ratio at Union Mill Elementary?
The student-to-teacher ratio at Union Mill Elementary is approximately 15.9:1 (55 FTE teachers).
What is the racial breakdown of students at Union Mill Elementary?
At Union Mill Elementary, the student body is approximately 59% White, 11% Hispanic, 5% Black, 16% Asian, 9% Two or more.
Is Union Mill Elementary public or private?
Union Mill Elementary is a public K-12 school, overseen by Fairfax County Public Schools.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.