How does Mt. Diablo Elementary compare to other elementary schools in Clayton?

Mt. Diablo Elementary has a SchoolScope composite score of 59.8/100, placing it at the 83rd percentile statewide. 38% of students exceed standard, with a total of 1,354 students tested across grades and subjects.

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

37.8% of students at Mt. Diablo Elementary exceed the state standard on CAASPP assessments, while 69.7% meet or exceed it. The gap between these two numbers reveals whether the school pushes students beyond basic proficiency.

Is Mt. Diablo Elementary improving or declining?

Mt. Diablo Elementary's proficiency rate decreases by 8.8 percentage points from grade 3 to grade 5, suggesting the school is not sustaining early academic gains.

What is the chronic absenteeism rate at Mt. Diablo Elementary?

8.3% of students at Mt. Diablo Elementary 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.

Mt. Diablo Elementary

Mt. Diablo Unified Clayton Contra Costa County 94517

Composite Score

out of 100

State Percentile

of elementary schools

State Rank

1,354 students tested

School overview

Enrollment

738 students

Student-Teacher Ratio

30:1

Free/Reduced Lunch

Teachers

25 full-time

Student demographics

Hispanic 16.9%

White 53.7%

Asian 8.1%

Black 1.1%

Other 20.2%

Performance breakdown

Performance breakdown for Mt. Diablo Elementary
Category	Percentage
Exceeded Standard	37.8%
Met Standard	31.9%
Below Standard	30.3%

Exceeded

37.8%

Met

31.9%

Below

30.3%

What other rankings don't show you

Most rating sites report "70% proficient" for Mt. Diablo Elementary and stop there. Here's what that number hides:

37.8% of students exceeded standard while 31.9% merely met it. That exceeded rate is 16.9 points above the state average of 21.0%. That's 19.0 points above the Mt. Diablo Unified district average of 18.8%. Compared to the 3 nearby schools within ~3 miles, this exceeded rate is 15.7 points higher (vs 22.2% average). The gap between "met" and "exceeded" is the difference between a school that clears the bar and one that raises it.

Proficiency drops by 8.8 percentage points from grade 3 to grade 5 — a signal that the school may not be sustaining early gains.

Chronic absenteeism is 8.3%, better than the state average of 18.7%.