How does Sandburg Middle compare to other middle schools in Glendora?

Sandburg Middle has a SchoolScope composite score of 51.4/100, placing it at the 75th percentile statewide. 22% of students exceed standard, with a total of 1,340 students tested across grades and subjects.

What percentage of students exceed standards at Sandburg Middle?

22.2% of students at Sandburg Middle exceed the state standard on CAASPP assessments, while 49.3% 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 Sandburg Middle?

12.7% of students at Sandburg 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.

Sandburg Middle

Q: Is Sandburg Middle improving or declining?

Sandburg Middle's proficiency rate increases by 12.2 percentage points from Grade 6 to grade 8 growth, suggesting the school is adding value over time.

Middle School

Glendora Unified GlendoraLos Angeles County91741

Composite Score

out of 100

State Percentile

of middle schools

State Rank

of 1,714 California middle schools

School overview

Enrollment

682 students

Student-Teacher Ratio

24:1

Free/Reduced Lunch

43%

Teachers

29 full-time

Dashboard indicators

ELA Year-over-Year

Increased

+7.6 pts DFS change

Math Year-over-Year

Increased

+9.0 pts DFS change

EL Proficiency (ELPAC)

17.4%

English learners at Level 4 (Well Developed) · 46 tested

Data source: California School Dashboard 2025, ELPAC 2024

Student demographics

Hispanic62.9%

White18.6%

Asian7.8%

Black1.9%

Other8.8%

Performance breakdown

Performance breakdown for Sandburg Middle
Category	Percentage
Exceeded Standard	22.2%
Met Standard	27.1%
Below Standard	50.7%

What other rankings don't show you

Most rating sites report "49% proficient" for Sandburg Middle and stop there. Here's what that number hides:

22.2% of students exceeded standard while 27.1% merely met it. That exceeded rate is 4.8 points above the state average of 17.3%. That's 4.0 points below the Glendora Unified district average of 26.2%. Nearby schools (within ~3 miles) average 21.8% exceeded — about the same. 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 12.2 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. 17.4% of English learners reached Level 4 (Well Developed) on ELPAC.

Chronic absenteeism is 12.7%, better than the state average of 19.3%.

Why the exceeded vs. met split matters →

Key metrics

% Exceeded Standard

22.2%

Students scoring above proficient

% Met or Above

49.3%

Students meeting standard

Growth (G6→G8)

+12.2pp

Change in proficiency rate

Chronic Absenteeism

12.7%

Students missing 10%+ of days

Suspension Rate

5.5%

Students suspended at least once

Total Tested

1,340

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	237	13.1%	31.6%	35.9%	19.4%	44.7%
7th	227	20.7%	39.6%	27.8%	11.9%	60.4%
8th	207	21.7%	36.7%	26.6%	15.0%	58.5%

Math scores by grade

Grade	Tested	Exceeded	Met	Nearly Met	Not Met	Met+Above
6th	238	16.8%	17.6%	29.4%	36.1%	34.5%
7th	225	32.4%	20.0%	23.6%	24.0%	52.4%
8th	206	28.2%	17.0%	17.5%	37.4%	45.1%

K-12 Feeder PathBoundary data

Elementary

Zoned

Zoned

Also serves area

▼

Middle

Sandburg Middle

51.475th pctile

This school

▼

High School

Glendora High

69.390th pctile

Zoned

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