How does Lone Hill Middle compare to other middle schools in San Dimas?

Lone Hill Middle has a SchoolScope composite score of 56.1/100, placing it at the 83rd percentile statewide. 34% of students exceed standard, with a total of 1,731 students tested across grades and subjects.

What percentage of students exceed standards at Lone Hill Middle?

33.8% of students at Lone Hill Middle exceed the state standard on CAASPP assessments, while 62.7% 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 Lone Hill Middle?

10.5% of students at Lone Hill 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.

Lone Hill Middle

Q: Is Lone Hill Middle improving or declining?

Lone Hill Middle's proficiency rate increases by 0.3 percentage points from Grade 6 to grade 8 growth, suggesting the school is adding value over time.

Middle School

Bonita Unified San DimasLos Angeles County91773

Composite Score

out of 100

State Percentile

of middle schools

State Rank

of 1,714 California middle schools

School overview

Enrollment

906 students

Student-Teacher Ratio

24:1

Free/Reduced Lunch

40%

Teachers

37 full-time

Dashboard indicators

ELA Year-over-Year

Maintained

+2.9 pts DFS change

Math Year-over-Year

Maintained

+0.2 pts DFS change

EL Proficiency (ELPAC)

37.5%

English learners at Level 4 (Well Developed) · 26 tested

Data source: California School Dashboard 2025, ELPAC 2024

Student demographics

Hispanic58.3%

White17.6%

Asian8.2%

Black2.9%

Other13.1%

Performance breakdown

Performance breakdown for Lone Hill Middle
Category	Percentage
Exceeded Standard	33.8%
Met Standard	28.9%
Below Standard	37.3%

What other rankings don't show you

Most rating sites report "63% proficient" for Lone Hill Middle and stop there. Here's what that number hides:

33.8% of students exceeded standard while 28.9% merely met it. That exceeded rate is 16.5 points above the state average of 17.3%. That's 3.8 points below the Bonita Unified district average of 37.6%. The 1 nearby schools within ~3 miles average 40.7% exceeded — 7.0 points higher. The gap between "met" and "exceeded" is the difference between a school that clears the bar and one that raises it.

Students here improve by 0.3 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 maintained and Math maintained year-over-year. 37.5% of English learners reached Level 4 (Well Developed) on ELPAC.

Chronic absenteeism is 10.5%, better than the state average of 19.3%.

Why the exceeded vs. met split matters →

Key metrics

% Exceeded Standard

33.8%

Students scoring above proficient

% Met or Above

62.7%

Students meeting standard

Growth (G6→G8)

+0.3pp

Change in proficiency rate

Chronic Absenteeism

10.5%

Students missing 10%+ of days

Suspension Rate

6.0%

Students suspended at least once

Total Tested

1,731

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	273	37.0%	33.0%	19.1%	11.0%	70.0%
7th	287	36.6%	33.1%	16.7%	13.6%	69.7%
8th	305	33.8%	39.7%	16.4%	10.2%	73.4%

Math scores by grade

Grade	Tested	Exceeded	Met	Nearly Met	Not Met	Met+Above
6th	275	36.0%	20.0%	25.1%	18.9%	56.0%
7th	286	26.6%	27.3%	23.1%	23.1%	53.9%
8th	305	32.8%	20.3%	19.3%	27.5%	53.1%

K-12 Feeder PathBoundary data

Elementary

Arma J. Shull Elementary

71.796th pctile

Zoned

Fred Ekstrand Elementary

51.970th pctile

Zoned

Gladstone Elementary

58.881st pctile

Zoned

Allen Avenue Elementary

52.471st pctile

Also serves area

▼

Middle

Lone Hill Middle

56.183rd pctile

This school

▼

High School

San Dimas High

67.788th pctile

Zoned

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