How does Hillsdale High compare to other high schools in San Mateo?

Hillsdale High has a SchoolScope composite score of 68.2/100, placing it at the 89th percentile statewide. 33% of students exceed standard, with a total of 712 students tested across grades and subjects.

What percentage of students exceed standards at Hillsdale High?

32.6% of students at Hillsdale High exceed the state standard on CAASPP assessments, while 57.0% meet or exceed it. The gap between these two numbers reveals whether the school pushes students beyond basic proficiency.

What is the chronic absenteeism rate at Hillsdale High?

12.6% of students at Hillsdale High are chronically absent (missing 10% or more of school days). This metric reflects school culture and family engagement, and is weighted at 15% in our composite score.

Hillsdale High

High School

San Mateo Union High San MateoSan Mateo County94403

📍 3115 Del Monte Street

Composite Score

out of 100

State Percentile

of high schools

State Rank

of 1,739 California high schools

💪

Strong All-Around

Strong across every dimension we measure — academics, growth, culture, and engagement.

Composite scores are SchoolScope's analysis of public data from the California Dept. of Education (CAASPP, chronic absenteeism, suspension rates). They are not official CDE ratings and should not be the sole basis for school decisions. See methodology.

School overview

Enrollment

1,581 students

Student-Teacher Ratio

18:1

Free/Reduced Lunch

19%

Teachers

86 full-time

College & career readiness

Graduation Rate

90.8%

AP Exam Prepared

75.6%

A-G Completion

74.9%

College-Going Rate

85.3%

Data source: California Department of Education — ACGR, CCI, CGR reports

Dashboard indicators

ELA Year-over-Year

Increased Significantly

+24.7 pts DFS change

Math Year-over-Year

Increased Significantly

+21.3 pts DFS change

EL Proficiency (ELPAC)

5.6%

English learners at Level 4 (Well Developed) · 197 tested

Data source: California School Dashboard 2025, ELPAC 2024

Student demographics

Hispanic36.8%

White30.8%

Asian15.9%

Black1.1%

Other15.4%

Performance breakdown

Performance breakdown for Hillsdale High
Category	Percentage
Exceeded Standard	32.6%
Met Standard	24.3%
Below Standard	43.0%

What other rankings don't show you

Most rating sites report "57% proficient" for Hillsdale High and stop there. Here's what that number hides:

32.6% of students exceeded standard while 24.3% met it. That exceeded rate is 17.1 points above the state average of 15.5%. That's near the San Mateo Union High district average of 32.0%. The 2 nearby schools within ~3 miles average 48.5% exceeded — 15.9 points higher. The gap between "met" and "exceeded" can reveal how much a school's curriculum challenges students beyond proficiency.

The graduation rate is 90.8% — above the state target. 74.9% of students complete A-G requirements for UC/CSU eligibility — a strong college readiness signal. 85.3% of graduates go on to college within a year.

Chronic absenteeism is 12.6%, better than the state average of 34.0%.

Why the exceeded vs. met split matters →