How does Arroyo High compare to other high schools in San Lorenzo?

Arroyo High has a SchoolScope composite score of 65.4/100, placing it at the 85th percentile statewide. 18% of students exceed standard, with a total of 655 students tested across grades and subjects.

What percentage of students exceed standards at Arroyo High?

17.8% of students at Arroyo High exceed the state standard on CAASPP assessments, while 45.1% 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 Arroyo High?

14.7% of students at Arroyo 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.

Arroyo High

High School

San Lorenzo Unified San LorenzoAlameda County94580

📍 15701 Lorenzo Avenue

Composite Score

out of 100

State Percentile

of high schools

State Rank

of 1,739 California high schools

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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

1,542 students

Student-Teacher Ratio

25:1

Free/Reduced Lunch

69%

Teachers

61 full-time

College & career readiness

Graduation Rate

91.7%

AP Exam Prepared

89.8%

A-G Completion

47.7%

College-Going Rate

70.7%

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

Dashboard indicators

ELA Year-over-Year

Increased

+10.7 pts DFS change

Math Year-over-Year

Declined

-8.6 pts DFS change

EL Proficiency (ELPAC)

11.6%

English learners at Level 4 (Well Developed) · 123 tested

Data source: California School Dashboard 2025, ELPAC 2024

Student demographics

Hispanic48.4%

White8.1%

Asian22.8%

Black5.1%

Other15.6%

Performance breakdown

Performance breakdown for Arroyo High
Category	Percentage
Exceeded Standard	17.8%
Met Standard	27.3%
Below Standard	54.9%

What other rankings don't show you

Most rating sites report "45% proficient" for Arroyo High and stop there. Here's what that number hides:

17.8% of students exceeded standard while 27.3% met it. That exceeded rate is 2.3 points above the state average of 15.5%. That's 8.0 points above the San Lorenzo Unified district average of 9.8%. Compared to the 6 nearby schools within ~3 miles, this exceeded rate is 13.6 points higher (vs 4.2% average). The gap between "met" and "exceeded" can reveal how much a school's curriculum challenges students beyond proficiency.

The graduation rate is 91.7% — above the state target. 47.7% of students complete A-G requirements for UC/CSU eligibility. 70.7% of graduates go on to college within a year.

Chronic absenteeism is 14.7%, better than the state average of 34.0%.

Why the exceeded vs. met split matters →