Armstrong Elementary

Regular School · Diamond Bar, CA

Armstrong Elementary is a regular school school in Diamond Bar, California, serving grades KG–06 with 251 students enrolled (SY 2024-2025). The student-teacher ratio is 18.6:1.

Level

Elementary

Grades

KG – 06

Enrollment

251

Teachers (FTE)

13.5

Student–Teacher Ratio

18.6:1

Status

Open

Lunch Program Participation

Yes under Community Eligibility Option (CEO)

Student Demographics (SY 2024-2025)

Race / Ethnicity	Students	Share
Hispanic/Latino	150	60%
Asian	37	15%
White	25	10%
Two or more races	23	9%
Black or African American	16	6%
Total enrollment	251	143M / 108F

English Language Learners: 34 (14% of enrollment) · SY 2021–22

Academic Performance (SY 2021-2022)

Metric	This School	State Avg	Tested
Math Proficiency	.	33.9%	—
Reading Proficiency	.	48.7%	—
Science Proficiency	.	—	—

Source: EDFacts, SY 2020–2021. Suppressed values (e.g. <=10%) indicate fewer than the minimum reportable threshold.

Stanford Achievement Estimate

Pooled score across SY 2009–2022 (grades 3–8), expressed in grade levels relative to the national average. Positive = above average.

Overall (Math + ELA)

-0.23 grade levels

Math

-0.19 grade levels

Programs & Discipline

Gifted & Talented

Program offered

1 students enrolled

Out-of-School Suspensions

0.4% of enrollment · SY 2021–22

Chronically Absent

15.9% of enrollment · SY 2019–20

Source: Civil Rights Data Collection (CRDC), Office for Civil Rights & EDFacts.

Lunch Program (SY 2024-2025)

Category	Students	% of School
Total enrollment (est.)	251	100%

Contact & Location

22750 Beaverhead Dr.

Diamond Bar, CA 91765

Phone: (909)397-4563

http://www.pusd.org

District

Pomona Unified

Per-pupil expenditure: $25,400

District enrollment: 21,326

Other Schools in District

Alcott Elementary Elementary
Allison Elementary Elementary
Arroyo Elementary Elementary
Barfield Elementary Elementary
Cortez Elementary Elementary
Decker Elementary Elementary
Golden Springs Elementary Elementary
Harrison Elementary Elementary

View all 36 schools →

Related Data

Neighborhood demographics (ZIP 91765) → CensusDepth.com
California population & income data → CensusDepth.com
California teacher salaries → WageDepth.com

NCES ID

063132004836

Data sources: NCES CCD SY 2024-2025 (directory, staff, lunch), EDFacts SY 2020-21 (assessments), CRDC SY 2021-22 (programs & discipline), SEDA v6.0 (achievement estimates). Updated annually. NCES CCD