1
What's the most underrated thing about Aragon High that outsiders don't know?
Community prompt from u/allk12. Replies below.
Enrollment
1,658
High
DISTRICT 1,092 · STATE 838
SCHOOL COMMUNITY·SAN MATEO UNION HIGH·NCES 063498005919
Aragon High
900 Alameda de las Pulgas, San Mateo, CA 94402 · (650) 558-2999 · San Mateo County
GRADES 09–12HIGH12-CITYREGULAR SCHOOL1,658 STUDENTS
B+
allk12 Grade
Scored higher than 69% of California public high schools
- ATest 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.
- DThree-year trend Change in reading and math proficiency over the last three test years.
Grades compare a school only with schools in the same state, because every state gives its own test. How grades work · Top-graded California public high schools
Student : Teacher
22.4:1
74 FTE teachers
DISTRICT 18.0:1 · STATE 18.2:1
Free / Reduced Lunch
17%
279 students
DISTRICT 35% · STATE 65%
Community
6
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 | 398 | 24% |
| Grade 10 | 398 | 24% |
| Grade 11 | 424 | 26% |
| Grade 12 | 438 | 26% |
Student demographics
73%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 72% · STATE 62% · 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
CAASPP 2024-25 . % met or exceeded standardEnglish Language Arts
81.7%
CA avg 49.1% . -4.3pp since 2014
Math
59.4%
CA avg 37.7% . -1.6pp since 2014
What this means: On the CAASPP, California's statewide test, about 82 of every 100 students at this school read and write at grade level and about 59 of 100 do math at grade level. Across all California schools, those numbers are about 49 and 38. Reading and writing scores are down about 4 points since 2014, while math scores are down about 2 points.
Performance levels, 2024-25
| Subject | Standard Exceeded | Standard Met | Standard Nearly Met | Standard Not Met |
|---|---|---|---|---|
| English Language Arts | 51.6% | 30.1% | 11.3% | 7.0% |
| Math | 37.8% | 21.6% | 16.8% | 23.8% |
Share of tested students at each CAASPP level. Each student counts in one level, so a row adds to about 100%.
CAASPP results by year
| School year | English Language Arts | Math |
|---|---|---|
| 2024-25 | 81.7% | 59.4% |
| 2023-24 | 78.2% | 56.9% |
| 2022-23 | 83.0% | 61.1% |
| 2021-22 | 86.0% | 62.9% |
| 2018-19 | 77.1% | 50.9% |
| 2017-18 | 79.1% | 54.1% |
| 2016-17 | 84.2% | 62.7% |
| 2015-16 | 86.0% | 60.0% |
| 2014-15 | 86.0% | 61.0% |
% met or exceeded standard, all students and all tested grades.
Source: CAASPP. 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
69.0%
composite math + reading, all grades
Predicted
69.7%
based on CA schools with similar FRL share
Beats by
-0.6pp
below demographic expectation
What this means: About 69% of students here test proficient in math and reading, compared with the roughly 70% typical for California 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 California'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 Aragon High
Aragon High's state test result (69.0% proficient) is higher than 0 of the 5 schools below with a result.
| School | Students | Low-income | Proficient |
|---|---|---|---|
| Aragon High this school | 1,658 | 16.8% | 69.0% |
| South Pasadena Senior High South Pasadena | 1,536 | 15.0% | 76.0% |
| Los Altos High Los Altos | 2,170 | 16.5% | 72.6% |
| South High Torrance | 1,734 | 22.4% | 69.1% |
| Mountain View High Mountain View | 2,187 | 12.7% | 75.0% |
| Palo Alto High Palo Alto | 1,891 | 13.3% | 73.0% |
Matched among California 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 Aragon High ranks
Among high schools| Measure | This school | In California | In San Mateo County |
|---|---|---|---|
| State test proficiency ranked highest first | 69.0% | #90 of 1,052 | #4 of 17 |
| Math proficiency ranked highest first | 59.4% | #95 of 1,056 ▲ 2 | #4 of 17 ▼ 1 |
| Reading proficiency ranked highest first | 81.7% | #84 of 1,056 ▲ 32 | #4 of 17 ▼ 1 |
| 3-year test score change ranked biggest drop first | -3.9pp | #175 of 1,044 | #5 of 17 |
| Enrollment ranked largest first | 1,658 | #473 of 2,093 | #5 of 35 |
| Students per teacher ranked fewest first | 22.4:1 | #921 of 1,352 | #21 of 23 |
| Diversity index ranked most diverse first | 73.4% | #41 of 1,351 | #1 of 23 |
| Free and reduced lunch ranked highest share first | 16.8% | #1,513 of 1,575 | #24 of 28 |
| Enrollment change since 2017-18 ranked fastest growth first | +1.2% | #286 of 327 | N/A |
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
1,658
-76 (-4%) vs 2020
+16% since 1990-91, when it was 1,432
Student : Teacher
22.4:1
was 22.8:1
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 | 1,658 | 74.1 | 22.4:1 | 17% (279) |
| 2023-24 | 1,686 | 78.1 | 21.6:1 | 15% (250) |
| 2022-23 | 1,740 | 75.2 | 23.1:1 | 15% (259) |
| 2020-21 | 1,734 | 76 | 22.8:1 | 18% (304) |
| 2017-18 | 1,639 | 75.5 | 21.7:1 | 22% (359) |
| 2015-16 | 1,473 | 69 | 21.4:1 | 13% (198) |
| 2010-11 | 1,587 | N/A | N/A | 11% (177) |
| 2000-01 | 1,580 | 71 | 22.3:1 | 3% (45) |
| 1990-91 | 1,432 | 66 | 21.7:1 | N/A |
Source: NCES Common Core of Data. Rows are the federal collections on file for Aragon High.
Since 2017-18: students up 1% (1,639 to 1,658); teachers down 2% (75.5 to 74.1).
About Aragon High
Aragon High is a large high school in San Mateo, California. Enrollment in 2024-25 was 1,658 students in grades 9 through 12. Against the 838-student average for high schools in California, enrollment here is 98% higher.
San Mateo Union High has 8 schools; together they serve 8,736 students.
Aragon High's enrollment has no majority group, and Asian students are the largest at 33%. Smaller groups are 27% Hispanic, 26% White, and 11% multiracial. The county population is about 31% Asian, within a few points of the school. By the diversity index, Aragon High comes in at 73%.
Teacher staffing is 74.1 full-time equivalents, or about 22.4 students per teacher. Among high schools in California, the typical ratio is 18.2:1. About 17% of students, or 279, qualify for free or reduced-price lunch. It compares with 34% for public schools in San Mateo County.
The allk12 Grade for Aragon High is B+. Compared with California public high schools, the school scored higher than 69% on a mix of test scores, poverty-adjusted results, and recent trend.
Test results at Aragon High are within a point of what its free or reduced-price lunch share predicts (69.0% actual, 69.7% predicted).
In the county around the school, San Mateo County, median household income is about $158,855, a bachelor's degree or higher is held by about 54% of adults, and the share of residents below the poverty line is 4%. A total of 176 public schools operate in San Mateo County, serving about 82,403 students.
Nearby, Baywood Elementary is about 0.2 miles away. Aragon High is one of several public schools in the area, with at least 8 others within five miles. Aragon High ranks 2nd of 9 among nearby schools on average proficiency, with 69.0% against a local average of 45.7%.
NCES assigns Aragon High the locale City: Mid-size, meaning inside a principal city with a population between 100,000 and 250,000.
The number of students declined from 1,734 to 1,658 over 4 years.
The allk12 site hosts a discussion page for Aragon High covering things like enrollment questions, class placement, and PTA news. Posting is open to anyone connected to the school.
San Mateo County at a glance
View full county profilePopulation
742,340
Census ACS
Median income
$158,855
Household, ACS
Bachelor's+
54%
Adults 25+
Poverty rate
4%
Below federal line
Schools in county
176
82,403 students
Quick facts
Related schools
Other schools in San Mateo Union High
- Hillsdale HighHigh · 1,585 students
- Burlingame HighHigh · 1,583 students
- San Mateo HighHigh · 1,557 students
- Mills HighHigh · 1,115 students
- Capuchino HighHigh · 1,061 students
- Peninsula High (Continuation)High · 123 students
Other schools in San Mateo
- Hillsdale HighHigh · 1,585 students
- San Mateo HighHigh · 1,557 students
- Borel MiddleMiddle · 903 students
- Bayside AcademyElementary · 840 students
- Abbott MiddleMiddle · 721 students
- Baywood ElementaryElementary · 489 students
Nearby schools
- Baywood Elementary0.2 mi · 489
- Borel Middle0.5 mi · 903
- South Hillsborough0.9 mi · 244
- Meadow Heights Elementary1.1 mi · 238
- Sunnybrae Elementary1.2 mi · 346
- Beresford Elementary1.3 mi · 218
Frequently asked questions
About Aragon HighHow many students attend Aragon High?
Aragon High enrolls approximately 1,658 students in grades 09-12.
What grades does Aragon High serve?
Aragon High serves grades 09-12.
What is the student-teacher ratio at Aragon High?
The student-to-teacher ratio at Aragon High is approximately 22.4:1 (74 FTE teachers).
What is the racial breakdown of students at Aragon High?
At Aragon High, the student body is approximately 26% White, 27% Hispanic, 1% Black, 33% Asian, 11% Two or more.
What district is Aragon High in?
Aragon High is part of San Mateo Union High.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.