Diamond Bar Montessori Academy
Private · Grades K · 7 students
Armstrong Elementary
22750 Beaverhead Dr., Diamond Bar, CA 91765
Grades
K–6
Elementary
Students
251
Enrolled 2024–25
Students per teacher
18.6 : 1
Full-time teachers
District
Pomona Unified
Los Angeles County
Schola Grade B · Above average
Letter grade (A–F) · compared with 5,632 California elementary schools · How we grade
Percentiles compare this school with other California elementary schools; the line marks the middle. Data: test scores 2021–22, graduation and absenteeism 2022–23 (U.S. Department of Education, EDFacts); coursework 2023–24 (Civil Rights Data Collection); staffing 2024–25 (NCES).
About Armstrong Elementary
Armstrong Elementary is a public elementary school in Diamond Bar, California, serving grades K–6. It is part of Pomona Unified. The school is located in a large suburb in Los Angeles County.
In the 2024–25 school year, 251 students were enrolled, with about 18.6 students for every full-time teacher. That ratio is smaller than the typical California elementary school (21.4 students per teacher). Its Schola Grade is B (above average), compared with 5,632 California elementary schools.
Grades & enrollment
Students per grade, 2024–25Grades K–6
Location & nearby schools
School details
- Type
- Public School · What this means
- Level
- Elementary
- Grades offered
- K–6
- Enrollment (2024–25)
- 251 students
- Students per teacher
- 18.6 to 1
- Charter school
- No
- Magnet school
- No
- Locale
- Suburb — Large
- School district
- Pomona Unified
- County
- Los Angeles County
- NCES school ID
- 063132004836
Schools near Armstrong Elementary
All 13 schools in Diamond Bar →
Mt. Calvary Lutheran School
Private · Grades Pre-K–8 · 192 students
Golden Springs Elementary
Public · Grades K–6 · 388 students
Bright Hope Education Center
Private · Grades K–6 · 73 students
Pantera Elementary
Public · Grades K–6 · 512 students
Maple Hill Elementary
Public · Grades K–5 · 556 students
School data comes from the U.S. Department of Education: the National Center for Education Statistics (NCES) Common Core of Data and EDGE school locations (2024–25) and Private School Survey (2023–24), the Civil Rights Data Collection (2023–24), and EDFacts (test results 2021–22; graduation and chronic absenteeism 2022–23), plus other public sources. Please contact the school to confirm enrollment, programs, and other details. How we source data.