How does Mt. Diablo High compare to other high schools in Concord?

Mt. Diablo High has a Scope Score of 36.8/100, ranked #1208 among California high schools. 7% of students exceed standard, with a total of 567 students tested across grades and subjects.

What percentage of students exceed standards at Mt. Diablo High?

7.2% of students at Mt. Diablo High exceed the state standard on CAASPP assessments, while 25.3% 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 Mt. Diablo High?

33.7% of students at Mt. Diablo 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 the Scope Score.

Mt. Diablo High

High School

Mt. Diablo Unified ConcordContra Costa County94520

📍 2450 Grant Street

Scope Score

out of 100

State Rank

of 1,649 California high schools

🌱

Building Momentum

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Scope 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

1,477 students

Student-Teacher Ratio

20:1

Free/Reduced Lunch

62%

Teachers

74 full-time

College & career readiness

Graduation Rate

88.7%

AP Exam Prepared

39.8%

A-G Completion

24.5%

College-Going Rate

56.7%

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

Dashboard indicators

How this school's scores changed from last year to this year

ELA Year-over-Year

Increased Significantly

+24.4 pts DFS change

Math Year-over-Year

Increased

+14.1 pts DFS change

EL Proficiency (ELPAC)

9.4%

English learners at Level 4 (Well Developed) · 497 tested

Data source: California School Dashboard 2025, ELPAC 2024

Student demographics

Hispanic74.3%

White3.7%

Asian4.2%

Black8.1%

Other9.7%

Performance breakdown

Performance breakdown for Mt. Diablo High
Category	Percentage
Exceeded Standard	7.2%
Met Standard	18.1%
Below Standard	74.7%

Score Factors

Helping

✓Graduation rate: 88.7%

1.3pp above state avg (state avg 87.4%)

25% weight

✓College readiness: 39.8%

AP exam pass rate above state avg (state avg 35.3%)

20% weight

✓Chronic absenteeism: 33.7%

0.6pp below state avg (state avg 34.3%)

10% weight

Holding Back

▼Exceeded standard: 7.2%

8.5pp below state avg (state avg 15.7%)

20% weight

▼Met or exceeded: 25.3%

9.5pp below state avg (state avg 34.8%)

15% weight

▼Baseline proficiency: 25.3%

Below state baseline (state avg 34.8%)

5% weight

▼Suspension rate: 8.1%

4.0pp above state avg (state avg 4.1%)

5% weight

Unlike traditional school ratings, we show our work. Every factor, its weight, and how this school compares to the state average — so you can decide what matters most to your family. The high school Scope Score is weighted across 7 dimensions. See full methodology →

What other rankings don't show you

Most rating sites report "25% proficient" for Mt. Diablo High and stop there. Here's what that number hides:

7.2% of students exceeded standard while 18.1% met it. That exceeded rate is 8.5 points below the state average of 15.7%. That's 11.3 points below the Mt. Diablo Unified district average of 18.5%. The 2 nearby schools within ~3 miles average 13.6% exceeded — 6.4 points higher. The gap between "met" and "exceeded" can reveal how much a school's curriculum challenges students beyond proficiency.

The graduation rate is 88.7%. 24.5% of students complete A-G requirements for UC/CSU eligibility. 56.7% of graduates go on to college within a year.

Chronic absenteeism is 33.7%, better than the state average of 34.3%.

Why the exceeded vs. met split matters →

A low score doesn't tell the whole story. Read: Your School Scored Low — Here's What That Actually Means

Key metrics

% Exceeded Standard

7.2%

Students scoring above proficient

% Met or Above

25.3%

Students meeting standard

Chronic Absenteeism

33.7%

Students missing 10%+ of days

Suspension Rate

8.1%

Students suspended at least once

Total Tested

567

Across all grades & subjects

ELA scores by grade

Grade	Tested	Exceeded	Met	Nearly Met	Not Met	Met+Above
11th	286	12.6%	25.5%	25.5%	36.4%	38.1%

Math scores by grade

Grade	Tested	Exceeded	Met	Nearly Met	Not Met	Met+Above
11th	281	1.8%	10.7%	15.3%	72.2%	12.5%

K-12 Feeder PathBoundary data

Elementary

Valhalla Elementary

73.0# in state

Monte Gardens Elementary

63.9# in state

Hidden Valley Elementary

59.7# in state

Delta View Elementary

Mountain View Elementary

39.9# in state

Westwood Elementary

37.9# in state

Sun Terrace Elementary

26.4# in state

Cambridge Elementary

24.6# in state

Ygnacio Valley Elementary

22.3# in state

Rio Vista Elementary

22.0# in state

Shore Acres Elementary

12.0# in state

Wren Avenue Elementary

Also serves area

Monte Gardens Elementary

63.9# in state

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Middle

Also serves area

▼

High School

Mt. Diablo High

36.8# in state

This school

Feeder patterns derived from 2015-16 NCES attendance boundary data. Boundaries may have changed. Contact your school district for current information.