Serving 251 students in grades Kindergarten-6, Armstrong Elementary School ranks in the top 50% of all schools in California for overall test scores (math proficiency is top 50%, and reading proficiency is top 50%).
The percentage of students achieving proficiency in math is 40-44% (which is higher than the California state average of 34%). The percentage of students achieving proficiency in reading/language arts is 50-54% (which is higher than the California state average of 47%).
The student-teacher ratio of 18:1 is lower than the California state level of 21:1.
Minority enrollment is 90% of the student body (majority Hispanic), which is higher than the California state average of 80% (majority Hispanic).
Quick Facts (26-27)
- Grades: Kindergarten-6
- Enrollment: 251 students
- Student-Teacher Ratio: 18:1
- Minority Enrollment: 90%
- Overall Testing Rank: Top 50% in CA
- Math Proficiency: 40-44% (Top 50%)
- Reading Proficiency: 50-54% (Top 50%)
- Science Proficiency: 40-49% (Top 30%)
- Attendance Zone: Armstrong Elementary serves the southwest part of Diamond Bar, CA, covering an area of approximately 2.4 square miles. Most families live within a 5-10 minute drive, with the furthest distance from the school being about 1.6 miles.
- Source: National Center for Education Statistics (NCES), CA Dept. of Education
School Overview
Armstrong Elementary School's student population of 251 students has declined by 13% over five school years.
The teacher population of 14 teachers has stayed relatively flat over five school years.
Grades Offered
Grades Kindergarten-6
Total Students
251 students
Showing 2015–2025. Full 39-year historical data available below ↓
Total Classroom Teachers
14 teachers
Showing 2014–2025. Full 39-year historical data available below ↓
Year Founded
2025
School Calendar
School Rankings
Armstrong Elementary School ranks within the top 50% of all 9,523 schools in California (based off of combined math and reading proficiency testing data).
The diversity score of Armstrong Elementary School is 0.60, which is less than the diversity score at state average of 0.63. The school's diversity has stayed relatively flat over five school years.
Overall Testing Rank
#2882 out of 9523 schools
(Top 50%)
(Top 50%)
Showing 2011–2023. Full 14-year historical data available below ↓
Math Test Scores (% Proficient)
40-44%
34%
Showing 2011–2023. Full 14-year historical data available below ↓
Reading/Language Arts Test Scores (% Proficient)
50-54%
47%
Science Test Scores (% Proficient)
40-49%
29%
Student-Teacher Ratio
18:1
21:1
Showing 2014–2025. Full 39-year historical data available below ↓
Asian
15%
12%
Showing 2015–2025. Full 38-year historical data available below ↓
Hispanic
60%
56%
Showing 2015–2025. Full 38-year historical data available below ↓
Black
6%
5%
Showing 2015–2025. Full 38-year historical data available below ↓
White
10%
20%
Showing 2015–2025. Full 38-year historical data available below ↓
Two or more races
9%
6%
Showing 2015–2025. Full 17-year historical data available below ↓
All Ethnic Groups
Showing 2015–2025. Full 38-year historical data available below ↓
Chronically Absent Students
(22-23)36.7%
27.7%
Eligible for Free Lunch
49%
54%
Showing 2015–2025. Full 34-year historical data available below ↓
Eligible for Reduced Lunch
18%
8%
Showing 2015–2025. Full 27-year historical data available below ↓
School Statewide Testing
School District Name
Source: National Center for Education Statistics (NCES), CA Dept. of Education
Frequently Asked Questions
What is Armstrong Elementary School's ranking?
Armstrong Elementary School is ranked #2882 out of 9,523 schools, which ranks it among the top 50% of public schools in California.
What percent of students have achieved state testing proficiency in math and reading?
40-44% of students have achieved math proficiency (compared to the 34% CA state average), while 50-54% of students have achieved reading proficiency (compared to the 47% CA state average).
How many students attend Armstrong Elementary School?
251 students attend Armstrong Elementary School.
What is the racial composition of the student body?
60% of Armstrong Elementary School students are Hispanic, 15% of students are Asian, 10% of students are White, 9% of students are Two or more races, and 6% of students are Black.
What is the student-teacher ratio of Armstrong Elementary School?
Armstrong Elementary School has a student ration of 18:1, which is lower than the California state average of 21:1.
What grades does Armstrong Elementary School offer ?
Armstrong Elementary School offers enrollment in grades Kindergarten-6
What school district is Armstrong Elementary School part of?
Armstrong Elementary School is part of Pomona Unified School District.
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