Serving 493 students in grades Kindergarten-8, Arroyo Elementary School ranks in the bottom 50% of all schools in California for overall test scores (math proficiency is bottom 50%, and reading proficiency is bottom 50%).
The percentage of students achieving proficiency in math is 21% (which is lower than the California state average of 34%). The percentage of students achieving proficiency in reading/language arts is 33% (which is lower than the California state average of 47%).
The student-teacher ratio of 21:1 is equal to the California state level of 21:1.
Minority enrollment is 97% of the student body (majority Hispanic), which is higher than the California state average of 80% (majority Hispanic).
Quick Facts (2026)
- Grades: Kindergarten-8
- Enrollment: 493 students
- Student-Teacher Ratio: 21:1
- Minority Enrollment: 97%
- Overall Testing Rank: Bottom 50% in CA
- Math Proficiency: 21% (Btm 50%)
- Reading Proficiency: 33% (Btm 50%)
- Science Proficiency: 20-29% (Top 50%)
- Attendance Zone: Arroyo Elementary serves the northeast part of Ontario, CA, covering an area of approximately 0.7 square miles. Most families live within a 5-10 minute drive from the school, with distances to the edge of the attendance zone averaging about 0.7 miles and extending up to 1.5 miles at its furthest point.
- Source: National Center for Education Statistics (NCES), CA Dept. of Education
School Overview
Arroyo Elementary School's student population of 493 students has grown by 36% over five school years.
The teacher population of 23 teachers has grown by 43% over five school years.
Grades Offered
Grades Kindergarten-8
Total Students
493 students
Total Classroom Teachers
23 teachers
School Calendar
School Rankings
Arroyo Elementary School ranks within the bottom 50% of all 9,523 schools in California (based off of combined math and reading proficiency testing data).
The diversity score of Arroyo Elementary School is 0.19, 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
#6473 out of 9523 schools
(Bottom 50%)
(Bottom 50%)
Math Test Scores (% Proficient)
21%
34%
Reading/Language Arts Test Scores (% Proficient)
33%
47%
Science Test Scores (% Proficient)
20-29%
29%
Student-Teacher Ratio
21:1
21:1
American Indian
1%
1%
Asian
3%
12%
Hispanic
90%
56%
Black
1%
5%
White
3%
20%
Hawaiian
1%
n/a
Two or more races
1%
6%
All Ethnic Groups
Chronically Absent Students
(22-23)29.8%
27.7%
Eligible for Free Lunch
69%
54%
Eligible for Reduced Lunch
8%
8%
School Statewide Testing
School District Name
Source: National Center for Education Statistics (NCES), CA Dept. of Education
Frequently Asked Questions
What is Arroyo Elementary School's ranking?
Arroyo Elementary School is ranked #6473 out of 9,523 schools, which ranks it among the bottom 50% of public schools in California.
What schools are Arroyo Elementary School often compared to?
Arroyo Elementary Schoolis often viewed alongside schools like Berlyn Elementary School by visitors of our site.
What percent of students have achieved state testing proficiency in math and reading?
21% of students have achieved math proficiency (compared to the 34% CA state average), while 33% of students have achieved reading proficiency (compared to the 47% CA state average).
How many students attend Arroyo Elementary School?
493 students attend Arroyo Elementary School.
What is the racial composition of the student body?
90% of Arroyo Elementary School students are Hispanic, 3% of students are Asian, 3% of students are White, 1% of students are American Indian, 1% of students are Black, 1% of students are Hawaiian, and 1% of students are Two or more races.
What is the student-teacher ratio of Arroyo Elementary School?
Arroyo Elementary School has a student ration of 21:1, which is equal to the California state average of 21:1.
What grades does Arroyo Elementary School offer ?
Arroyo Elementary School offers enrollment in grades Kindergarten-8
What school district is Arroyo Elementary School part of?
Arroyo Elementary School is part of Ontario-Montclair School District.
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