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What's the most underrated thing about Carlmont High that outsiders don't know?
Community prompt from u/allk12. Replies below.
Enrollment
2,360
High
DISTRICT 1,403 · STATE 838
SCHOOL COMMUNITY·SEQUOIA UNION HIGH·NCES 063639006194
Carlmont High
1400 Alameda de Las Pulgas, Belmont, CA 94002 · (650) 595-0210 · San Mateo County
GRADES 09–12HIGH21-SUBURBREGULAR SCHOOL2,360 STUDENTS
A
allk12 Grade
Scored higher than 89% of California 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.
- 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.
- CThree-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
19.7:1
120 FTE teachers
DISTRICT 17.1:1 · STATE 18.2:1
Free / Reduced Lunch
9%
220 students
DISTRICT 36% · 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 | 606 | 26% |
| Grade 10 | 576 | 24% |
| Grade 11 | 583 | 25% |
| Grade 12 | 595 | 25% |
Student demographics
69%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 68% · 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
85.2%
CA avg 49.1% . +4.2pp since 2014
Math
72.2%
CA avg 37.7% . +9.2pp since 2014
What this means: On the CAASPP, California's statewide test, about 85 of every 100 students at this school read and write at grade level and about 72 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 4 points since 2014, 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 | 59.4% | 25.8% | 6.8% | 8.0% |
| Math | 45.2% | 27.0% | 14.6% | 13.2% |
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 | 85.2% | 72.2% |
| 2023-24 | 87.0% | 74.0% |
| 2022-23 | 91.6% | 74.8% |
| 2021-22 | 88.0% | 69.5% |
| 2018-19 | 85.5% | 73.9% |
| 2017-18 | 84.1% | 71.4% |
| 2016-17 | 85.2% | 68.5% |
| 2015-16 | 70.0% | 60.0% |
| 2014-15 | 81.0% | 63.0% |
% 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
79.6%
composite math + reading, all grades
Predicted
74.1%
based on CA schools with similar FRL share
Beats by
+5.5pp
above demographic expectation
What this means: About 80% 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 Carlmont High
Carlmont High's state test result (79.6% proficient) is higher than 4 of the 5 schools below with a result.
| School | Students | Low-income | Proficient |
|---|---|---|---|
| Carlmont High this school | 2,360 | 9.3% | 79.6% |
| La Canada High La Canada | 1,989 | 4.7% | 86.3% |
| Vista del Lago High Folsom | 1,782 | 7.3% | 71.3% |
| Monte Vista High Danville | 2,042 | 5.4% | 73.6% |
| 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 Carlmont High ranks
Among high schools| Measure | This school | In California | In San Mateo County |
|---|---|---|---|
| State test proficiency ranked highest first | 79.6% | #30 of 1,052 | #1 of 17 |
| Math proficiency ranked highest first | 72.2% | #37 of 1,056 ▼ 17 | #1 of 17 no change |
| Reading proficiency ranked highest first | 85.2% | #45 of 1,056 ▼ 4 | #1 of 17 ▲ 1 |
| 3-year test score change ranked biggest drop first | -0.1pp | #377 of 1,044 | #15 of 17 |
| Enrollment ranked largest first | 2,360 | #142 of 2,093 | #1 of 35 |
| Students per teacher ranked fewest first | 19.7:1 | #504 of 1,352 | #17 of 23 |
| Diversity index ranked most diverse first | 69.4% | #138 of 1,351 | #7 of 23 |
| Free and reduced lunch ranked highest share first | 9.3% | #1,553 of 1,575 | #27 of 28 |
| Enrollment change since 2017-18 ranked fastest growth first | +8.1% | #155 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
2,360
+51 (+2%) vs 2020
+67% since 1990-91, when it was 1,409
Student : Teacher
19.7:1
was 21.4:1
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 | 2,360 | 120 | 19.7:1 | 9% (220) |
| 2023-24 | 2,360 | 115.4 | 20.5:1 | 9% (208) |
| 2022-23 | 2,322 | 114.5 | 20.3:1 | 9% (203) |
| 2020-21 | 2,309 | 108 | 21.4:1 | 10% (240) |
| 2017-18 | 2,184 | 99.3 | 22.0:1 | 12% (271) |
| 2015-16 | 2,147 | 99 | 21.7:1 | 11% (229) |
| 2010-11 | 2,144 | N/A | N/A | 19% (413) |
| 2000-01 | 1,641 | 72 | 22.8:1 | 7% (109) |
| 1990-91 | 1,409 | 62 | 22.7:1 | N/A |
Source: NCES Common Core of Data. Rows are the federal collections on file for Carlmont High.
Since 2017-18: students up 8% (2,184 to 2,360); teachers up 21% (99.3 to 120).
About Carlmont High
Carlmont High is a large high school in Belmont, California, administered by Sequoia Union High. School enrollment was 2,360 students in 2024-25, in grades 9 through 12. For comparison, high schools in California average about 838 students.
Carlmont High falls under Sequoia Union High, which has 6 schools enrolling 8,419 students.
Carlmont High's enrollment has no majority group, and White students are the largest at 41%. It is also 33% Asian, 15% Hispanic, and 9% multiracial. That is close to the 38% White share among all San Mateo County residents. The chance that two students picked at random at Carlmont High belong to different racial or ethnic groups, known as the diversity index, is 69%.
At Carlmont High, 120 full-time-equivalent teachers work with students, a ratio of about 19.7:1. That ratio is over the 18.2:1 average for high schools in California. Students eligible for free or reduced-price lunch make up 9% of enrollment. That is 25 points below the 34% average for public schools in San Mateo County.
allk12 grades Carlmont High an A. The grade compares the school only with California public high schools, because each state gives its own test.
Test results at Carlmont High are 5.5 points above what its free or reduced-price lunch share predicts (79.6% actual, 74.1% predicted).
Census Bureau estimates for San Mateo County show that median household income is about $158,855, 54% of adults hold a bachelor's degree or higher, and about 4% of residents live below the federal poverty line. A total of 176 public schools operate in San Mateo County, serving about 82,403 students.
The nearest public school is Tierra Linda Middle, at about 0.2 miles. There are at least 8 other public schools within five miles. By average proficiency, Carlmont High is 6th among 8 schools close by.
Carlmont High is in a suburban area outside a principal city, within an urbanized area with a population of 250,000 or more, a location NCES labels Suburb: Large.
Enrollment went from 2,309 in 2020-21 to 2,360 in 2024-25, a change of 51 students. The ratio of students to teachers went from 21.4:1 to 19.7:1 over the same years.
Posts about school safety, transportation, and start times are welcome on this page. Questions from prospective families are welcome too.
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 Sequoia Union High
- Menlo-Atherton HighHigh · 2,158 students
- Sequoia HighHigh · 1,854 students
- Woodside HighHigh · 1,660 students
- Tide AcademyHigh · 212 students
- Redwood HighHigh · 175 students
Other schools in Belmont
- Ralston IntermediateMiddle · 1,082 students
- Nesbit ElementaryElementary · 566 students
- Cipriani ElementaryElementary · 471 students
- Central ElementaryElementary · 437 students
- Fox ElementaryElementary · 420 students
Nearby schools
- Tierra Linda Middle0.2 mi · 451
- Mariposa0.2 mi · 322
- San Carlos Charter Learning Center0.3 mi · 377
- Arundel Elementary0.8 mi · 388
- Heather Elementary1.2 mi · 320
- Cipriani Elementary1.2 mi · 471
Frequently asked questions
About Carlmont HighWhat is the total enrollment at Carlmont High?
Carlmont High enrolls approximately 2,360 students in grades 09-12.
Is Carlmont High an elementary, middle, or high school?
Carlmont High is a high school covering grades 09-12.
How many teachers does Carlmont High have?
Carlmont High employs 120 FTE teachers, for a student-to-teacher ratio of 19.7:1.
What is the student diversity at Carlmont High?
Student demographics at Carlmont High are roughly 41% White, 15% Hispanic, 1% Black, 33% Asian, 9% Two or more.
What district is Carlmont High in?
Carlmont High is part of Sequoia Union High.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.