Enrollment
290
Elementary
DISTRICT 330 · STATE 465
SCHOOL COMMUNITY·SAN CARLOS ELEMENTARY·NCES 063429013998
Arroyo
1710 Arroyo Ave., San Carlos, CA 94070 · (650) 632-8300 · San Mateo County
GRADES 04–05ELEMENTARY21-SUBURBREGULAR SCHOOL290 STUDENTS
Student : Teacher
22.2:1
13 FTE teachers
DISTRICT 22.0:1 · STATE 22.3:1
Free / Reduced Lunch
10%
28 students
DISTRICT 10% · STATE 65%
Community
0
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 |
|---|---|---|
| Grade 4 | 142 | 49% |
| Grade 5 | 148 | 51% |
Student demographics
64%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 71% · 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
82.8%
CA avg 49.1% . +7.1pp since 2016
Math
79.0%
CA avg 37.7% . +9.5pp since 2016
What this means: On the CAASPP, California's statewide test, about 83 of every 100 students at this school read and write at grade level and about 79 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 7 points since 2016, while math scores are up about 9 points.
Performance levels, 2024-25
| Subject | Standard Exceeded | Standard Met | Standard Nearly Met | Standard Not Met |
|---|---|---|---|---|
| English Language Arts | 53.5% | 29.3% | 10.3% | 6.9% |
| Math | 57.0% | 22.0% | 13.8% | 7.2% |
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 | 82.8% | 79.0% |
| 2023-24 | 80.8% | 79.4% |
| 2022-23 | 81.7% | 76.8% |
| 2021-22 | 79.5% | 75.7% |
| 2020-21 | 75.4% | 64.5% |
| 2018-19 | 76.3% | 73.0% |
| 2017-18 | 76.2% | 74.1% |
| 2016-17 | 75.7% | 69.5% |
% 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
80.5%
composite math + reading, all grades
Predicted
73.9%
based on CA schools with similar FRL share
Beats by
+6.6pp
above demographic expectation
What this means: About 81% of students here test proficient in math and reading, compared with the roughly 74% 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
Arroyo's state test result (80.5% proficient) is higher than 2 of the 5 schools below with a result.
| School | Students | Low-income | Proficient |
|---|---|---|---|
| Arroyo this school | 290 | 9.7% | 80.5% |
| Del Mar Heights Elementary Del Mar | 293 | 10.2% | 82.5% |
| White Oaks Elementary San Carlos | 250 | 6.4% | 79.4% |
| Beach Elementary Piedmont | 323 | 4.3% | 91.7% |
| Wildwood Elementary Piedmont | 291 | 3.8% | 86.0% |
| Camino Pablo Elementary Moraga | 340 | 4.4% | 76.1% |
Matched among California 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 Arroyo ranks
Among elementary schools| Measure | This school | In California | In San Mateo County |
|---|---|---|---|
| State test proficiency ranked highest first | 80.5% | #203 of 5,151 | #17 of 96 |
| Math proficiency ranked highest first | 79.0% | #270 of 5,172 ▼ 15 | #20 of 96 ▲ 2 |
| Reading proficiency ranked highest first | 82.8% | #168 of 5,172 ▲ 56 | #10 of 96 ▲ 2 |
| 3-year test score change ranked biggest gain first | +3.3pp | #2,194 of 5,116 | #33 of 96 |
| Enrollment ranked largest first | 290 | #4,844 of 5,915 | #81 of 106 |
| Students per teacher ranked fewest first | 22.2:1 | #2,356 of 5,352 | #54 of 99 |
| Diversity index ranked most diverse first | 64.3% | #1,335 of 5,354 | #49 of 99 |
| Free and reduced lunch ranked highest share first | 9.7% | #5,484 of 5,625 | #88 of 103 |
| Enrollment change since 2017-18 ranked steepest decline first | -12.4% | #2,382 of 3,837 | #49 of 79 |
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
290
+11 (+4%) vs 2020
Student : Teacher
22.2:1
was 25.4:1
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 | 290 | 13.1 | 22.2:1 | 10% (28) |
| 2023-24 | 287 | 12.1 | 23.8:1 | 7% (20) |
| 2022-23 | 277 | 13.6 | 20.3:1 | 8% (23) |
| 2020-21 | 279 | 11 | 25.4:1 | 6% (16) |
| 2017-18 | 331 | 16.2 | 20.4:1 | 7% (23) |
Source: NCES Common Core of Data. Rows are the federal collections on file for Arroyo.
Since 2017-18: students down 12% (331 to 290); teachers down 20% (16.2 to 13.1).
About Arroyo
Arroyo operates as a small elementary school in San Carlos, California. Enrollment totals 290 students across grades 4 through 5. Across elementary schools in California, the average enrollment is about 465.
San Carlos Elementary has 8 schools and 2,875 students, and Arroyo is one of those schools.
Federal enrollment data show Arroyo is 53% White. Enrollment also includes 18% Asian, 17% multiracial, and 11% Hispanic. The school's White share is 16 points above the 38% share among San Mateo County residents. Its diversity index, the chance that two randomly chosen students belong to different racial or ethnic groups, is 64%.
For every teacher at Arroyo, there are about 22.2 students; the school has 13.1 full-time-equivalent teachers. It is about the same as the 22.3:1 average for elementary schools in California. There are 28 students eligible for free or reduced-price lunch, 10% of enrollment. By comparison, the figure for public schools in San Mateo County is 34%.
Test results at Arroyo are 6.6 points above what its free or reduced-price lunch share predicts (80.5% actual, 73.9% predicted).
In San Mateo County, where the school is located, the median household earns about $158,855 a year, 54% of adults hold a bachelor's degree or higher, and about 4% of people live in poverty. Counting Arroyo, San Mateo County has 176 public schools.
Among nearby public schools, Central Middle is closest at less than a tenth of a mile. In all, at least 8 other public schools sit within five miles of Arroyo. Among the 7 closest schools with test data, this one included, Arroyo ranks 4th on average proficiency.
NCES assigns Arroyo the locale Suburb: Large, meaning in a suburban area outside a principal city, within an urbanized area with a population of 250,000 or more.
Enrollment increased by 4% across 4 years, from 279 in 2020-21 to 290 in 2024-25. The ratio of students to teachers went from 25.4:1 to 22.2:1 over the same years.
People can post here about open houses, carpools, and field trips and other school topics. Parents, students, alumni, and staff are welcome to post.
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 Carlos Elementary
- Tierra Linda MiddleMiddle · 451 students
- Central MiddleMiddle · 443 students
- Brittan Acres ElementaryElementary · 411 students
- Arundel ElementaryElementary · 388 students
- MariposaElementary · 322 students
- Heather ElementaryElementary · 320 students
Other schools in San Carlos
- Tierra Linda MiddleMiddle · 451 students
- Central MiddleMiddle · 443 students
- Brittan Acres ElementaryElementary · 411 students
- Arundel ElementaryElementary · 388 students
- San Carlos Charter Learning CenterElementary · 377 students
- MariposaElementary · 322 students
Nearby schools
- Central Middle0.1 mi · 443
- Brittan Acres Elementary0.4 mi · 411
- White Oaks Elementary0.7 mi · 250
- Arundel Elementary0.8 mi · 388
- Heather Elementary0.9 mi · 320
- Redwood High0.9 mi · 175
Frequently asked questions
About ArroyoWhat is the total enrollment at Arroyo?
Arroyo enrolls approximately 290 students in grades 04-05.
What grades does Arroyo serve?
Arroyo serves grades 04-05.
How many students per teacher at Arroyo?
Approximately 22.2:1 students per teacher at Arroyo.
What is the racial breakdown of students at Arroyo?
At Arroyo, the student body is approximately 53% White, 11% Hispanic, 1% Black, 18% Asian, 17% Two or more.
Who oversees Arroyo?
Arroyo is overseen by San Carlos Elementary in San Mateo County.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.