Enrollment
306
Elementary
DISTRICT 387 · STATE 465
SCHOOL COMMUNITY·SAN MATEO-FOSTER CITY·NCES 063492005404
Brewer Island Elementary
1151 Polynesia Dr., Foster City, CA 94404 · (650) 312-7532 · San Mateo County
GRADES KG–05ELEMENTARY21-SUBURBREGULAR SCHOOL306 STUDENTS
A-
allk12 Grade
Scored higher than 75% of California public elementary 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.
- FThree-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 elementary schools
Student : Teacher
21.9:1
14 FTE teachers
DISTRICT 21.7:1 · STATE 22.3:1
Free / Reduced Lunch
19%
57 students
DISTRICT 39% · 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 |
|---|---|---|
| Kindergarten | 64 | 21% |
| Grade 1 | 41 | 13% |
| Grade 2 | 49 | 16% |
| Grade 3 | 44 | 14% |
| Grade 4 | 59 | 19% |
| Grade 5 | 49 | 16% |
This year's kindergarten class (64) is 31% larger than its 5th grade class (49).
Student demographics
67%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
70.9%
CA avg 49.1% . -5.1pp since 2014
Math
75.3%
CA avg 37.7% . -7.7pp since 2014
What this means: On the CAASPP, California's statewide test, about 71 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 California schools, those numbers are about 49 and 38. Reading and writing scores are down about 5 points since 2014, while math scores are down about 8 points.
Performance levels, 2024-25
| Subject | Standard Exceeded | Standard Met | Standard Nearly Met | Standard Not Met |
|---|---|---|---|---|
| English Language Arts | 46.4% | 24.5% | 11.9% | 17.2% |
| Math | 50.0% | 25.3% | 12.3% | 12.3% |
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 | 70.9% | 75.3% |
| 2023-24 | 77.2% | 76.6% |
| 2022-23 | 82.3% | 81.4% |
| 2021-22 | 86.0% | 86.0% |
| 2020-21 | 86.1% | 82.0% |
| 2018-19 | 79.2% | 80.1% |
| 2017-18 | 75.3% | 76.4% |
| 2016-17 | 76.0% | 77.2% |
| 2015-16 | 81.0% | 81.0% |
| 2014-15 | 76.0% | 83.0% |
% 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
74.9%
composite math + reading, all grades
Predicted
68.6%
based on CA schools with similar FRL share
Beats by
+6.2pp
above demographic expectation
What this means: About 75% of students here test proficient in math and reading, compared with the roughly 69% 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 Brewer Island Elementary
Brewer Island Elementary's state test result (74.9% proficient) is higher than 2 of the 5 schools below with a result.
| School | Students | Low-income | Proficient |
|---|---|---|---|
| Brewer Island Elementary this school | 306 | 18.6% | 74.9% |
| Beach Park Elementary Foster City | 347 | 14.7% | 74.0% |
| Franklin Elementary Burlingame | 357 | 17.1% | 81.2% |
| Central Park Elementary Santa Clara | 419 | 19.8% | 58.1% |
| Walter Hays Elementary Palo Alto | 305 | 17.0% | 78.1% |
| Lakeview Elementary Yorba Linda | 381 | 22.3% | 79.5% |
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 Brewer Island Elementary ranks
Among elementary schools| Measure | This school | In California | In San Mateo County |
|---|---|---|---|
| State test proficiency ranked highest first | 74.9% | #436 of 5,151 | #27 of 96 |
| Math proficiency ranked highest first | 75.3% | #408 of 5,172 ▼ 49 | #27 of 96 no change |
| Reading proficiency ranked highest first | 70.9% | #704 of 5,172 ▼ 339 | #29 of 96 ▼ 9 |
| 3-year test score change ranked biggest drop first | -12.9pp | #52 of 5,116 | #4 of 96 |
| Enrollment ranked largest first | 306 | #4,713 of 5,915 | #74 of 106 |
| Students per teacher ranked fewest first | 21.9:1 | #2,098 of 5,352 | #49 of 99 |
| Diversity index ranked most diverse first | 66.9% | #1,013 of 5,354 | #38 of 99 |
| Free and reduced lunch ranked highest share first | 18.6% | #5,194 of 5,625 | #64 of 103 |
| Enrollment change since 2017-18 ranked steepest decline first | -46.6% | #58 of 3,837 | #2 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
306
-158 (-34%) vs 2020
-37% since 2000-01, when it was 489
Student : Teacher
21.9:1
was 22.1:1
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 | 306 | 14 | 21.9:1 | 19% (57) |
| 2023-24 | 360 | 16.5 | 21.8:1 | 20% (71) |
| 2022-23 | 357 | 18 | 19.8:1 | 9% (31) |
| 2020-21 | 464 | 21 | 22.1:1 | 7% (34) |
| 2017-18 | 573 | 23 | 24.9:1 | 7% (40) |
| 2015-16 | 696 | 28 | 24.9:1 | 4% (30) |
| 2010-11 | 692 | N/A | N/A | 4% (28) |
| 2000-01 | 489 | 25 | 19.6:1 | 3% (16) |
Source: NCES Common Core of Data. Rows are the federal collections on file for Brewer Island Elementary.
Since 2017-18: students down 47% (573 to 306); teachers down 39% (23 to 14).
About Brewer Island Elementary
Located in Foster City, California, Brewer Island Elementary is a low-enrollment elementary school. The school counts 306 students across kindergarten through 5. The typical figure for elementary schools in California is about 465 students.
The district, San Mateo-Foster City, operates 22 schools serving 9,906 students.
Asian students are the majority at Brewer Island Elementary, with 50% of enrollment. Enrollment also includes 20% Hispanic, 14% multiracial, and 13% White. The school's Asian share is 19 points above the 31% share among San Mateo County residents. The school's diversity index is 67%, meaning two students picked at random have a 67% chance of belonging to different racial or ethnic groups.
The ratio of students to teachers is 21.9:1, with 14 full-time-equivalent teachers on staff. That is close to the 22.3:1 average for elementary schools in California. The percentage of students eligible for free or reduced-price lunch is 19%. That is 15 points below the 34% average for public schools in San Mateo County.
The allk12 Grade for Brewer Island Elementary is A-. Compared with California public elementary schools, the school scored higher than 75% on a mix of test scores, poverty-adjusted results, and recent trend.
The allk12 BeatsExpectations score for Brewer Island Elementary is +6.2 points: 74.9% actual, 68.6% predicted.
Brewer Island Elementary is located in San Mateo County, where the median household income is $158,855, the share of adults with a bachelor's degree or higher is 54%, and roughly 4% of residents are in poverty. Besides Brewer Island Elementary, San Mateo County has 175 other public schools.
The next-closest public school is Audubon Elementary, about 0.4 miles away. The count of other public schools within five miles is at least 8. Of 8 schools in the immediate area with test results, Brewer Island Elementary ranks 3rd on average proficiency.
Its NCES locale code is Suburb: Large: the school is in a suburban area outside a principal city, within an urbanized area with a population of 250,000 or more.
Compared with 2020-21, the school had 158 fewer students in 2024-25.
Parents and students can post about sports tryouts, band and choir, and theater at Brewer Island Elementary. Alumni can share how the school prepared them.
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-Foster City
- Bowditch MiddleMiddle · 929 students
- Borel MiddleMiddle · 903 students
- Bayside AcademyElementary · 840 students
- Abbott MiddleMiddle · 721 students
- Foster City ElementaryElementary · 624 students
- Baywood ElementaryElementary · 489 students
Other schools in Foster City
- Bowditch MiddleMiddle · 929 students
- Foster City ElementaryElementary · 624 students
- Audubon ElementaryElementary · 445 students
- Beach Park ElementaryElementary · 347 students
- San Mateo-Foster City Special Education PreschoolElementary · 1 students
Nearby schools
- Audubon Elementary0.4 mi · 445
- Bowditch Middle0.7 mi · 929
- San Mateo-Foster City Special Education Preschool0.8 mi · 1
- Beach Park Elementary0.8 mi · 347
- Foster City Elementary1.3 mi · 624
- Redwood Shores Elementary1.5 mi · 404
Frequently asked questions
About Brewer Island ElementaryHow many students attend Brewer Island Elementary?
Brewer Island Elementary enrolls approximately 306 students in grades KG-05.
What grades does Brewer Island Elementary serve?
Brewer Island Elementary serves grades KG-05.
How many students per teacher at Brewer Island Elementary?
Approximately 21.9:1 students per teacher at Brewer Island Elementary.
What is the student diversity at Brewer Island Elementary?
Student demographics at Brewer Island Elementary are roughly 13% White, 20% Hispanic, 1% Black, 50% Asian, 14% Two or more.
Is Brewer Island Elementary public or private?
Brewer Island Elementary is a public K-12 school, overseen by San Mateo-Foster City.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.