Enrollment
123
Elementary
DISTRICT 99 · STATE 451
SCHOOL COMMUNITY·MARY C O'BRIEN ACCOMMODATION DISTRICT (4435)·NCES 040274000203
Mary C O'Brien Elementary School
1400 N ELEVEN MILE CORNER RD, CASA GRANDE, AZ 85194 · (520) 450-4400 · Pinal County
GRADES KG–06ELEMENTARY42-RURALREGULAR SCHOOL123 STUDENTS
B-
allk12 Grade
Scored higher than 46% of Arizona public elementary schools
- C+Test scores Share of students meeting the state standard in reading, math, and other tested subjects, 2023-24 and 2024-25.
- ·Beats expectations Not available for this school, so the grade uses the other parts.
- A-Three-year trend Change in reading and math proficiency over the last three test years.
Grades compare a school only with schools in the same state, because every state gives its own test. How grades work · Top-graded Arizona public elementary schools
Student : Teacher
9.8:1
13 FTE teachers
DISTRICT 8.5:1 · STATE 17.0:1
Free / Reduced Lunch
,
Title I proxy
STATE 95%
Community
0
0 members
Enrollment and student:teacher ratio compared against other elementary schools. Free/Reduced Lunch and demographics compared against all schools.
Enrollment by grade, 2024-25
| Grade | Students | Share |
|---|---|---|
| Kindergarten | 20 | 16% |
| Grade 1 | 16 | 13% |
| Grade 2 | 20 | 16% |
| Grade 3 | 17 | 14% |
| Grade 4 | 17 | 14% |
| Grade 5 | 17 | 14% |
| Grade 6 | 16 | 13% |
This year's kindergarten class (20) is 25% larger than its 6th grade class (16).
Student demographics
58%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 50% · STATE 65% · US 70%
Student head counts by race/ethnicity from federal NCES enrollment data. District, state, and US figures are each group's share of all public school students in that area (US excludes territories). Very small groups may be suppressed in the source, so categories do not always sum exactly to total enrollment.
Gender split
QUIET COMMUNITY
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START A DISCUSSIONTest scores
AASA 2023-24 . % PassingEnglish Language Arts
88.0%
AZ avg 42.2% . +19.0pp since 2017
Math
79.0%
AZ avg 35.1% . -4.0pp since 2017
What this means: On the AASA, Arizona's statewide test, about 88 of every 100 students at this school read and write at grade level and about 79 of 100 do math at grade level. Across all Arizona schools, those numbers are about 42 and 35. Reading and writing scores are up about 19 points since 2017, while math scores are down about 4 points.
AASA results by year
| School year | English Language Arts | Math |
|---|---|---|
| 2023-24 | 88.0% | 79.0% |
| 2022-23 | 82.0% | 78.0% |
| 2021-22 | 80.0% | 72.0% |
| 2020-21 | 75.0% | 68.0% |
| 2018-19 | 77.0% | 80.0% |
| 2017-18 | 69.0% | 83.0% |
% Passing, all students and all tested grades.
Source: AASA. All students, all grades. See all years and grades →
Where Mary C O'Brien Elementary School ranks
Among elementary schools| Measure | This school | In Arizona | In Pinal County |
|---|---|---|---|
| Math proficiency ranked highest first | 79.0% | #22 of 1,072 ▼ 4 | #1 of 54 no change |
| Reading proficiency ranked highest first | 88.0% | #4 of 1,072 ▲ 9 | #1 of 54 no change |
| 3-year test score change ranked biggest gain first | +12.0pp | #55 of 930 | #4 of 44 |
| Enrollment ranked largest first | 123 | #1,104 of 1,223 | #58 of 62 |
Ranked against other public elementary schools. Online schools are left out of every list, and test-score lists leave out schools that serve specialized populations. Each rank links to the full list. Arrows under a test-score rank show places moved since the prior test year, among schools tested both years.
4-year change
SY 2020-21 vs SY 2024-25Enrollment
123
+6 (+5%) vs 2020
+46% since 1990-91, when it was 84
Student : Teacher
9.8:1
was 10.6:1
Source: NCES Common Core of Data
Enrollment and staffing by year
| School year | Students | Teachers (FTE) | Students per teacher | Free and reduced lunch |
|---|---|---|---|---|
| 2024-25 | 123 | 12.5 | 9.8:1 | N/A |
| 2023-24 | 122 | 13.5 | 9.0:1 | N/A |
| 2022-23 | 120 | 11.5 | 10.4:1 | 62% (74) |
| 2020-21 | 117 | 11 | 10.6:1 | N/A |
| 2017-18 | 113 | 10 | 11.3:1 | 61% (69) |
| 2015-16 | 118 | 10 | 11.8:1 | 97% (115) |
| 2010-11 | 129 | 9 | 14.3:1 | 98% (126) |
| 2000-01 | 94 | 6 | 15.7:1 | N/A |
| 1990-91 | 84 | 4 | 21.0:1 | N/A |
Source: NCES Common Core of Data. Rows are the federal collections on file for Mary C O'Brien Elementary School.
Since 2017-18: students up 9% (113 to 123); teachers up 25% (10 to 12.5).
About Mary C O'Brien Elementary School
Families in CASA GRANDE, Arizona, are served by Mary C O'Brien Elementary School, a very small elementary school. The school has 123 students in 2024-25 across kindergarten through 6. That compares with an average of about 451 students for elementary schools in Arizona.
Mary C O'Brien Accommodation District (4435) serves 198 students across 2 schools.
The largest group at Mary C O'Brien Elementary School is Hispanic students, at 53%. Enrollment also includes 37% White, 7% multiracial, and 2% Native American. Among people living in Pinal County, the Hispanic share is about 30%. The diversity index for Mary C O'Brien Elementary School is 58%. For US public schools as a whole it is 70%.
The school has 12.5 full-time-equivalent teachers and a ratio of 9.8 students per teacher. Elementary schools in Arizona average 17.0:1, 7.1 more students per teacher than here.
Mary C O'Brien Elementary School holds a B- allk12 Grade, placing it above 46% of Arizona public elementary schools.
Five-year Census Bureau estimates for Pinal County show that the median household earns about $80,266 a year, about 23% of adults have at least a bachelor's degree, and the poverty rate is about 8%. Across Pinal County, 155 public schools serve about 63,837 students.
CAVIT - Central Arizona Valley Institute of Technology sits about 5.7 miles from Mary C O'Brien Elementary School. Inside a ten-mile radius, there are at least 8 other public schools.
Locale: Rural: Distant. In NCES terms, the school is in rural territory some distance from an urban area.
Over 4 years, enrollment increased by 6 students, from 117 to 123.
The allk12 page for Mary C O'Brien Elementary School lets the school community talk about athletics, class schedules, and weather closures. You can also rate the school on this page.
Pinal County at a glance
View full county profilePopulation
469,006
Census ACS
Median income
$80,266
Household, ACS
Bachelor's+
23%
Adults 25+
Poverty rate
8%
Below federal line
Schools in county
155
63,837 students
Quick facts
Related schools
Other schools in Mary C O'Brien Accommodation District (4435)
- Villa Oasis Interscholastic Center For Education (voice)High · 75 students
Other schools in CASA GRANDE
- Vista Grande High SchoolHigh · 1,943 students
- Casa Grande Union High SchoolHigh · 1,912 students
- Legacy Traditional School - Casa GrandeElementary · 1,486 students
- The Grande InnovationElementary · 833 students
- Cactus Middle SchoolMiddle · 737 students
- Villago Middle SchoolMiddle · 723 students
Nearby schools
- CAVIT - Central Arizona Valley Institute of Technology5.7 mi · 80
- West Elementary School6.1 mi · 604
- Heartland Ranch Elementary School6.4 mi · 545
- CAVIT - Coolidge High School6.6 mi · 4
- Coolidge High School6.6 mi · 752
- Coolidge Jr. High School6.7 mi · 688
Frequently asked questions
About Mary C O'Brien Elementary SchoolHow large is Mary C O'Brien Elementary School?
Mary C O'Brien Elementary School enrolls approximately 123 students in grades KG-06.
What age range does Mary C O'Brien Elementary School serve?
Mary C O'Brien Elementary School serves students from grade KG through grade 06.
How many teachers does Mary C O'Brien Elementary School have?
Mary C O'Brien Elementary School employs 13 FTE teachers, for a student-to-teacher ratio of 9.8:1.
What is the student diversity at Mary C O'Brien Elementary School?
Student demographics at Mary C O'Brien Elementary School are roughly 37% White, 53% Hispanic, 1% Black, 7% Two or more.
Who oversees Mary C O'Brien Elementary School?
Mary C O'Brien Elementary School is overseen by Mary C O'Brien Accommodation District (4435) in Pinal County.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.