1
What's something Arroyo High does better than most schools?
Community prompt from u/allk12. Replies below.
Enrollment
1,499
High
DISTRICT 697 · STATE 838
SCHOOL COMMUNITY·SAN LORENZO UNIFIED·NCES 063471005845
Arroyo High
15701 Lorenzo Ave., San Lorenzo, CA 94580 · (510) 317-4000 · Alameda County
GRADES 09–12HIGH21-SUBURBTITLE IREGULAR SCHOOL1,499 STUDENTS
B
allk12 Grade
Scored higher than 57% of California public high schools
- BTest scores Share of students meeting the state standard in reading, math, and other tested subjects, 2023-24 and 2024-25.
- BBeats expectations How far test scores land above or below what the share of low-income students predicts for a school in this state.
- B-Three-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
24.6:1
61 FTE teachers
DISTRICT 18.2:1 · STATE 18.2:1
Free / Reduced Lunch
65%
968 students
DISTRICT 75% · 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 | 384 | 26% |
| Grade 10 | 371 | 25% |
| Grade 11 | 371 | 25% |
| Grade 12 | 373 | 25% |
Student demographics
64%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 58% · 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
59.0%
CA avg 49.1% . +12.0pp since 2014
Math
31.1%
CA avg 37.7% . +1.1pp since 2014
What this means: On the CAASPP, California's statewide test, about 59 of every 100 students at this school read and write at grade level and about 31 of 100 do math at grade level. Across all California schools, those numbers are about 49 and 38. Reading and writing scores are up about 12 points since 2014, while math scores are up about 1 points.
Performance levels, 2024-25
| Subject | Standard Exceeded | Standard Met | Standard Nearly Met | Standard Not Met |
|---|---|---|---|---|
| English Language Arts | 22.5% | 36.5% | 21.6% | 19.5% |
| Math | 13.1% | 18.1% | 19.0% | 49.8% |
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 | 59.0% | 31.1% |
| 2023-24 | 52.8% | 30.3% |
| 2022-23 | 66.2% | 35.4% |
| 2021-22 | 59.9% | 26.8% |
| 2018-19 | 59.5% | 35.5% |
| 2017-18 | 67.0% | 34.4% |
| 2016-17 | 64.7% | 47.9% |
| 2015-16 | 68.0% | 44.0% |
| 2014-15 | 47.0% | 30.0% |
% 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
43.3%
composite math + reading, all grades
Predicted
41.7%
based on CA schools with similar FRL share
Beats by
+1.6pp
above demographic expectation
What this means: About 43% of students here test proficient in math and reading, compared with the roughly 42% 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 Arroyo High
Arroyo High's state test result (43.3% proficient) is higher than 3 of the 5 schools below with a result.
| School | Students | Low-income | Proficient |
|---|---|---|---|
| Arroyo High this school | 1,499 | 64.6% | 43.3% |
| Sanger West High Fresno | 1,438 | 65.6% | 39.4% |
| Lathrop High Lathrop | 1,486 | 62.2% | 42.6% |
| John F. Kennedy High La Palma | 1,983 | 69.5% | 57.7% |
| Burton (Phillip and Sala) Academic High San Francisco | 1,047 | 67.7% | 44.1% |
| Andrew P. Hill High San Jose | 1,564 | 67.6% | 31.9% |
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 Arroyo High ranks
Among high schools| Measure | This school | In California | In Alameda County |
|---|---|---|---|
| State test proficiency ranked highest first | 43.3% | #451 of 1,052 | #19 of 35 |
| Math proficiency ranked highest first | 31.1% | #414 of 1,056 ▼ 42 | #19 of 35 no change |
| Reading proficiency ranked highest first | 59.0% | #501 of 1,056 ▲ 93 | #19 of 35 ▲ 1 |
| 3-year test score change ranked biggest gain first | +1.7pp | #549 of 1,044 | #11 of 34 |
| Enrollment ranked largest first | 1,499 | #563 of 2,093 | #20 of 85 |
| Students per teacher ranked fewest first | 24.6:1 | #1,173 of 1,352 | #46 of 55 |
| Diversity index ranked most diverse first | 64.4% | #274 of 1,351 | #19 of 55 |
| Free and reduced lunch ranked highest share first | 64.6% | #964 of 1,575 | #39 of 68 |
| Enrollment change since 2017-18 ranked steepest decline first | -18.1% | #212 of 802 | #8 of 27 |
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
1,499
-273 (-15%) vs 2020
0% since 1990-91, when it was 1,493
Student : Teacher
24.6:1
was 26.1:1
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 | 1,499 | 60.9 | 24.6:1 | 65% (968) |
| 2023-24 | 1,542 | 61.8 | 24.9:1 | 69% (1,058) |
| 2022-23 | 1,610 | 61.1 | 26.4:1 | 70% (1,128) |
| 2020-21 | 1,772 | 68 | 26.1:1 | 47% (837) |
| 2017-18 | 1,830 | 79.3 | 23.1:1 | 51% (933) |
| 2015-16 | 1,839 | 81 | 22.7:1 | 50% (923) |
| 2010-11 | 1,789 | N/A | N/A | 29% (527) |
| 2000-01 | 1,774 | 84 | 21.1:1 | 14% (240) |
| 1990-91 | 1,493 | 66 | 22.6:1 | N/A |
Source: NCES Common Core of Data. Rows are the federal collections on file for Arroyo High.
Since 2017-18: students down 18% (1,830 to 1,499); teachers down 23% (79.3 to 60.9).
About Arroyo High
Located in San Lorenzo, California, Arroyo High is a large high school. It has an enrollment of 1,499 students in grades 9 through 12. On average, high schools in California enroll around 838, and this school is 79% larger than that mark.
Federal data list 16 schools in San Lorenzo Unified, with 7,936 students enrolled.
At Arroyo High, Hispanic students make up the biggest share, 50%. Other groups include 31% Asian, 7% White, 6% Black, and 4% multiracial. By comparison, Alameda County residents are about 23% Hispanic. On a 0 to 100 scale, the school's diversity index is 64, compared with 70 nationally.
There are 60.9 full-time-equivalent teachers at Arroyo High, giving a ratio of 24.6:1. The school's 24.6:1 compares with an average of 18.2:1 for high schools in California. By family income, 65% of students are eligible for free or reduced-price lunch. That is higher than the 49% average for public schools in Alameda County.
On the allk12 Grade, Arroyo High lands at B, ahead of 57% of California public high schools.
After adjusting for student poverty, Arroyo High lands between the top and bottom 10% of California schools. Its average proficiency rate across its state test results is 43.3%; the prediction is 41.7%.
In the surrounding county, Alameda County, the median household earns about $129,367 a year, 52% of adults hold a bachelor's degree or higher, and about 6% of residents live below the federal poverty line. Counting Arroyo High, Alameda County has 394 public schools.
Grant Elementary is about 0.2 miles away, making it the nearest public school. Other public schools within five miles number at least 8. Ranked by average proficiency, Arroyo High places 1st out of 6 schools in its immediate area.
Federal data place Arroyo High in the Suburb: Large locale, which means it is in a suburban area outside a principal city, within an urbanized area with a population of 250,000 or more.
The 2020-21-to-2024-25 change in enrollment was a 15% decline, from 1,772 to 1,499. The student-to-teacher ratio went down from 26.1:1 to 24.6:1.
This page collects posts and questions about Arroyo High, such as fundraisers, report cards, and school supplies. Members of the school community can share what they know.
Alameda County at a glance
View full county profilePopulation
1,649,473
Census ACS
Median income
$129,367
Household, ACS
Bachelor's+
52%
Adults 25+
Poverty rate
6%
Below federal line
Schools in county
394
210,511 students
Quick facts
Related schools
Other schools in San Lorenzo Unified
- San Lorenzo HighHigh · 1,029 students
- Bohannon MiddleMiddle · 606 students
- Hesperian ElementaryElementary · 500 students
- Washington Manor MiddleMiddle · 500 students
- Edendale MiddleMiddle · 483 students
- Colonial Acres ElementaryElementary · 458 students
Other schools in San Lorenzo
- San Lorenzo HighHigh · 1,029 students
- KIPP King Collegiate HighHigh · 662 students
- Bohannon MiddleMiddle · 606 students
- Hesperian ElementaryElementary · 500 students
- Edendale MiddleMiddle · 483 students
- KIPP Summit AcademyMiddle · 427 students
Other Arroyo High schools
One other US public school is named Arroyo High. Arroyo High is the 2nd largest of the 2.
- Arroyo HighEl Monte, CA · 1,638 students
Nearby schools
- Grant Elementary0.2 mi · 322
- Bay Elementary0.7 mi · 422
- KIPP King Collegiate High0.8 mi · 662
- KIPP Summit Academy0.8 mi · 427
- Washington Manor Middle0.8 mi · 500
- Del Rey Elementary0.9 mi · 373
Frequently asked questions
About Arroyo HighWhat is the total enrollment at Arroyo High?
Arroyo High enrolls approximately 1,499 students in grades 09-12.
What age range does Arroyo High serve?
Arroyo High serves students from grade 09 through grade 12.
How many students per teacher at Arroyo High?
Approximately 24.6:1 students per teacher at Arroyo High.
How diverse is Arroyo High?
Arroyo High reports a student body of 7% White, 50% Hispanic, 6% Black, 31% Asian, 4% Two or more.
What district is Arroyo High in?
Arroyo High is part of San Lorenzo Unified.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.