How does Del Mar Middle compare to other middle schools in Tiburon?

Del Mar Middle has a SchoolScope composite score of 70.4/100, placing it at the 97th percentile statewide. 52% of students exceed standard, with a total of 704 students tested across grades and subjects.

What percentage of students exceed standards at Del Mar Middle?

52.2% of students at Del Mar Middle exceed the state standard on CAASPP assessments, while 82.6% meet or exceed it. The gap between these two numbers reveals whether the school pushes students beyond basic proficiency.

Is Del Mar Middle improving or declining?

Based on CAASPP data, Del Mar Middle's proficiency rate increases by 3.7 percentage points from Grade 6 to grade 8 growth. This suggests the school may be adding value over time.

What is the chronic absenteeism rate at Del Mar Middle?

10.4% of students at Del Mar Middle 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.

Del Mar Middle

Middle School

Reed Union Elementary TiburonMarin County94920

📍 105 Avenida Miraflores

Composite Score

out of 100

State Percentile

of middle schools

State Rank

of 1,714 California middle schools

⭐

High Ceiling

A high-ceiling school — students here are pushed to exceed, not just meet, the standard.

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

361 students

Student-Teacher Ratio

12:1

Free/Reduced Lunch

Teachers

31 full-time

Dashboard indicators

ELA Year-over-Year

Increased

+11.4 pts DFS change

Math Year-over-Year

Increased

+12.6 pts DFS change

Data source: California School Dashboard 2025, ELPAC 2024

Student demographics

Hispanic9.7%

White72.0%

Asian5.0%

Black0.8%

Other12.5%

Performance breakdown

Performance breakdown for Del Mar Middle
Category	Percentage
Exceeded Standard	52.2%
Met Standard	30.4%
Below Standard	17.4%

What other rankings don't show you

Most rating sites report "83% proficient" for Del Mar Middle and stop there. Here's what that number hides:

52.2% of students exceeded standard while 30.4% met it. That exceeded rate is 34.9 points above the state average of 17.3%. That's 2.7 points above the Reed Union Elementary district average of 49.5%. The gap between "met" and "exceeded" can reveal how much a school's curriculum challenges students beyond proficiency.

Students here improve by 3.7 percentage points from Grade 6 to grade 8 growth, suggesting the school is adding value beyond what students arrive with.

California's Dashboard shows ELA performance increased and Math increased year-over-year.

Chronic absenteeism is 10.4%, better than the state average of 19.3%.

Why the exceeded vs. met split matters →

Key metrics

% Exceeded Standard

52.2%

Students scoring above proficient

% Met or Above

82.6%

Students meeting standard

Growth (G6→G8)

+3.7pp

Change in proficiency rate

Chronic Absenteeism

10.4%

Students missing 10%+ of days

Suspension Rate

2.2%

Students suspended at least once

Total Tested

704

Across all grades & subjects

Grade trajectory

ELA Trajectory

G6 → G7 → G8

Math Trajectory

G6 → G7 → G8

ELA scores by grade

Grade	Tested	Exceeded	Met	Nearly Met	Not Met	Met+Above
6th	119	42.9%	35.3%	16.8%	5.0%	78.2%
7th	112	52.7%	37.5%	7.1%	2.7%	90.2%
8th	121	44.6%	38.8%	9.9%	6.6%	83.5%

Math scores by grade

Grade	Tested	Exceeded	Met	Nearly Met	Not Met	Met+Above
6th	119	52.9%	25.2%	16.0%	5.9%	78.2%
7th	112	58.9%	26.8%	9.8%	4.5%	85.7%
8th	121	61.2%	19.0%	10.7%	9.1%	80.2%

K-12 Feeder PathBoundary data

Elementary

Bel Aire Elementary

67.091st pctile

▼

Middle

Del Mar Middle

70.497th pctile

This school

▼

High School

No feeder data available for this level

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