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What do you wish you knew before starting at Garnet Valley HS?
Community prompt from u/allk12. Replies below.
Enrollment
1,485
High
DISTRICT 885 · STATE 738
SCHOOL COMMUNITY·GARNET VALLEY SD·NCES 421059001869
Garnet Valley High School
552 Smithbridge Rd, Glen Mills, PA 19342 · (610) 579-7745 · Delaware County
GRADES 09–12HIGH21-SUBURBREGULAR SCHOOL1,485 STUDENTS
A
allk12 Grade
Scored higher than 93% of Pennsylvania public high schools
- A+Test scores Share of students meeting the state standard in reading, math, and other tested subjects, 2023-24 and 2024-25.
- A-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 Pennsylvania public high schools
Student : Teacher
12.8:1
116 FTE teachers
DISTRICT 11.3:1 · STATE 12.8:1
Free / Reduced Lunch
16%
238 students
DISTRICT 14% · STATE 75%
Community
1
0 members
Enrollment and student:teacher ratio compared against other high schools. Free/Reduced Lunch and demographics compared against all schools.
Enrollment by grade, 2024-25
| Grade | Students | Share |
|---|---|---|
| Grade 9 | 349 | 24% |
| Grade 10 | 342 | 23% |
| Grade 11 | 384 | 26% |
| Grade 12 | 410 | 28% |
Student demographics
48%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 50% · STATE 59% · 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
School pathway
Feeds from
Based on grade levels within Garnet Valley SD. Attendance zones can vary; confirm enrollment with the district.
Test scores
PSSA + Keystone 2024-25 . % Proficient or AdvancedEnglish Language Arts
86.2%
PA avg 51.1% . -5.1pp since 2023
Math
74.5%
PA avg 43.0% . +1.3pp since 2023
What this means: On the PSSA + Keystone, Pennsylvania's statewide test, about 86 of every 100 students at this school read and write at grade level and about 75 of 100 do math at grade level. Across all Pennsylvania schools, those numbers are about 51 and 43. Reading and writing scores are down about 5 points since 2023, while math scores are up about 1 points.
PSSA + Keystone results by year
| School year | English Language Arts | Math |
|---|---|---|
| 2024-25 | 86.2% | 74.5% |
| 2023-24 | 91.3% | 73.2% |
% Proficient or Advanced, all students and all tested grades.
Source: PSSA + Keystone. 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
80.0%
composite math + reading, all grades
Predicted
70.7%
based on PA schools with similar FRL share
Beats by
+9.3pp
above demographic expectation
What this means: About 80% of students here test proficient in math and reading, compared with the roughly 71% typical for Pennsylvania 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 Pennsylvania'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 Garnet Valley High School
Garnet Valley High School's state test result (80.0% proficient) is higher than 3 of the 5 schools below with a result.
| School | Students | Low-income | Proficient |
|---|---|---|---|
| Garnet Valley High School this school | 1,485 | 16.0% | 80.0% |
| South Fayette High School McDonald | 1,143 | 16.0% | 82.1% |
| Downingtown HS East Campus Exton | 1,708 | 20.3% | 71.5% |
| Unionville High School Kennett Square | 1,263 | 8.2% | 81.6% |
| North Allegheny High School Wexford | 2,711 | 10.4% | 79.2% |
| Lower Moreland High School Huntingdon Valley | 879 | 20.7% | 68.7% |
Matched among Pennsylvania high 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 Garnet Valley High School ranks
Among high schools| Measure | This school | In Pennsylvania | In Delaware County |
|---|---|---|---|
| State test proficiency ranked highest first | 80.0% | #27 of 576 | #3 of 14 |
| Math proficiency ranked highest first | 74.5% | #25 of 626 ▲ 1 | #3 of 16 no change |
| Reading proficiency ranked highest first | 86.2% | #34 of 626 ▼ 18 | #5 of 16 ▼ 4 |
| Enrollment ranked largest first | 1,485 | #73 of 713 | #4 of 19 |
| Students per teacher ranked fewest first | 12.8:1 | #203 of 601 | #4 of 17 |
| Diversity index ranked most diverse first | 48.0% | #165 of 604 | #6 of 17 |
| Free and reduced lunch ranked highest share first | 16.0% | #601 of 619 | #16 of 17 |
| Enrollment change since 2017-18 ranked steepest decline first | -12.2% | #136 of 373 | #3 of 7 |
Ranked against other public high 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
1,485
-64 (-4%) vs 2020
+111% since 1990-91, when it was 705
Student : Teacher
12.8:1
was 13.2:1
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 | 1,485 | 115.6 | 12.8:1 | 16% (238) |
| 2023-24 | 1,500 | 116.7 | 12.8:1 | 16% (238) |
| 2022-23 | 1,546 | 117.1 | 13.2:1 | 13% (202) |
| 2020-21 | 1,549 | 117 | 13.2:1 | 9% (142) |
| 2017-18 | 1,691 | 113.8 | 14.9:1 | N/A |
| 2015-16 | 1,632 | 106 | 15.4:1 | 9% (144) |
| 2010-11 | 1,503 | 110 | 13.7:1 | 7% (105) |
| 2000-01 | 905 | 64 | 14.1:1 | 1% (6) |
| 1990-91 | 705 | 61 | 11.6:1 | N/A |
Source: NCES Common Core of Data. Rows are the federal collections on file for Garnet Valley High School.
Since 2017-18: students down 12% (1,691 to 1,485); teachers up 2% (113.8 to 115.6).
About Garnet Valley High School
Garnet Valley High School is a high school in Glen Mills, Pennsylvania, reachable at (610) 579-7745. Its grade span covers grades 9 through 12, with 1,485 students on the rolls. That compares with an average of about 738 students for high schools in Pennsylvania.
Besides Garnet Valley High School, Garnet Valley SD runs 4 other schools. The district enrolls 4,425 students.
The largest group at Garnet Valley High School is White students, at 69%. Other groups include 22% Asian, 4% multiracial, 3% Hispanic, and 2% Black. Measured by the diversity index, the student body scores 48%.
Based on 115.6 full-time-equivalent teachers, Garnet Valley High School has a ratio of 12.8:1. The ratio is within a point of the 12.8:1 average for high schools in Pennsylvania. Income data for the school show 16% of students eligible for free or reduced-price lunch. That is 42 points below the 58% average for public schools in Delaware County.
Among Pennsylvania public high schools, Garnet Valley High School outscored 93%, which works out to an A on the allk12 Grade.
The school's average proficiency rate across its state test results is 80.0%. For its free or reduced-price lunch share, the predicted value is 70.7%.
The county, Delaware County, is where the school is located. Median household income comes to about $89,546, a bachelor's degree or higher is held by about 42% of adults, and the poverty rate is about 7%. The county has 113 public schools and about 74,663 students.
Garnet Valley High School is about 0.6 miles from Garnet Valley Middle School, its nearest public school. Garnet Valley High School has at least 8 other public schools within five miles. Garnet Valley High School ranks 1st of 5 among nearby schools on average proficiency, with 80.0% against a local average of 69.5%.
In the federal locale system, Garnet Valley High School is coded Suburb: Large, for schools in a suburban area outside a principal city, within an urbanized area with a population of 250,000 or more.
Enrollment in 2024-25 stood at 1,485, compared with 1,549 in 2020-21.
You can use this page to share news and ask questions about open houses, carpools, and field trips. You can also rate the school on this page.
Delaware County at a glance
View full county profilePopulation
579,222
Census ACS
Median income
$89,546
Household, ACS
Bachelor's+
42%
Adults 25+
Poverty rate
7%
Below federal line
Schools in county
113
74,663 students
Quick facts
Related schools
Other schools in Garnet Valley SD
- Garnet Valley Middle SchoolMiddle · 1,086 students
- Garnet Valley Elementary SchoolElementary · 700 students
- Concord Elementary SchoolElementary · 617 students
- Bethel Springs Elementary SchoolElementary · 537 students
Other schools in Glen Mills
- Garnet Valley Middle SchoolMiddle · 1,086 students
- Garnet Valley Elementary SchoolElementary · 700 students
- Concord Elementary SchoolElementary · 617 students
Nearby schools
- Garnet Valley Middle School0.6 mi · 1,086
- Garnet Valley Elementary School0.6 mi · 700
- Concord Elementary School0.9 mi · 617
- Bethel Springs Elementary School1.7 mi · 537
- Concord High School2.8 mi · 994
- Delaware County Technical High School - Aston2.8 mi · 80
Frequently asked questions
About Garnet Valley High SchoolWhat is the total enrollment at Garnet Valley High School?
Garnet Valley High School enrolls approximately 1,485 students in grades 09-12.
Is Garnet Valley High School an elementary, middle, or high school?
Garnet Valley High School is a high school covering grades 09-12.
How many teachers does Garnet Valley High School have?
Garnet Valley High School employs 116 FTE teachers, for a student-to-teacher ratio of 12.8:1.
What is the student diversity at Garnet Valley High School?
Student demographics at Garnet Valley High School are roughly 69% White, 3% Hispanic, 2% Black, 22% Asian, 4% Two or more.
Who oversees Garnet Valley High School?
Garnet Valley High School is overseen by Garnet Valley SD in Delaware County.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.