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What's the biggest difference between Mariposa Elementary and what you expected?
Community prompt from u/allk12. Replies below.
Enrollment
537
Elementary
DISTRICT 517 · STATE 465
SCHOOL COMMUNITY·ONTARIO-MONTCLAIR·NCES 062847004406
Mariposa Elementary
1605 East D St., Ontario, CA 91764 · (909) 983-4116 · San Bernardino County
GRADES KG–06ELEMENTARY12-CITYTITLE IREGULAR SCHOOL537 STUDENTS
B-
allk12 Grade
Scored higher than 47% of California public elementary schools
- CTest scores Share of students meeting the state standard in reading, math, and other tested subjects, 2023-24 and 2024-25.
- BBeats expectations How far test scores land above or below what the share of low-income students predicts for a school in this state.
- 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 California public elementary schools
Student : Teacher
21.5:1
25 FTE teachers
DISTRICT 22.5:1 · STATE 22.3:1
Free / Reduced Lunch
95%
509 students
DISTRICT 87% · STATE 65%
Community
6
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 | 118 | 22% |
| Grade 1 | 80 | 15% |
| Grade 2 | 74 | 14% |
| Grade 3 | 104 | 19% |
| Grade 4 | 86 | 16% |
| Grade 5 | 71 | 13% |
| Grade 6 | 4 | 1% |
Student demographics
26%Diversity index
The chance that two students picked at random belong to different racial or ethnic groups.
DISTRICT 22% · STATE 62% · 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
Test scores
CAASPP 2024-25 . % met or exceeded standardEnglish Language Arts
26.9%
CA avg 49.1% . +6.9pp since 2014
Math
24.4%
CA avg 37.7% . +14.4pp since 2014
What this means: On the CAASPP, California's statewide test, about 27 of every 100 students at this school read and write at grade level and about 24 of 100 do math at grade level. Across all California schools, those numbers are about 49 and 38. Reading and writing scores are up about 7 points since 2014, while math scores are up about 14 points.
Performance levels, 2024-25
| Subject | Standard Exceeded | Standard Met | Standard Nearly Met | Standard Not Met |
|---|---|---|---|---|
| English Language Arts | 11.7% | 15.2% | 25.4% | 47.7% |
| Math | 7.1% | 17.3% | 28.2% | 47.4% |
Share of tested students at each CAASPP level. Each student counts in one level, so a row adds to about 100%.
CAASPP results by year
| School year | English Language Arts | Math |
|---|---|---|
| 2024-25 | 26.9% | 24.4% |
| 2023-24 | 32.6% | 29.1% |
| 2022-23 | 27.9% | 22.1% |
| 2021-22 | 18.5% | 16.0% |
| 2018-19 | 33.5% | 24.3% |
| 2017-18 | 27.0% | 24.8% |
| 2016-17 | 26.0% | 15.9% |
| 2015-16 | 23.0% | 9.0% |
| 2014-15 | 20.0% | 10.0% |
% met or exceeded standard, all students and all tested grades.
Source: CAASPP. All students, all grades. See all years and grades →
BeatsExpectations
Demographically-adjusted score · methodologyTier
AS EXPECTED
Performing as predicted given the school's student profile
Actual proficiency
28.8%
composite math + reading, all grades
Predicted
24.0%
based on CA schools with similar FRL share
Beats by
+4.8pp
above demographic expectation
What this means: About 29% of students here test proficient in math and reading, compared with the roughly 24% typical for California schools with a similar share of low-income students. BeatsExpectations measures results against demographically similar schools rather than by raw scores, and this school falls within the typical range, neither among California's top nor bottom 10%.
BeatsExpectations runs a per-state regression of proficiency on free/reduced-lunch share, then scores each school by residual. How this is calculated →
Schools most like Mariposa Elementary
Mariposa Elementary's state test result (28.8% proficient) is higher than 5 of the 5 schools below with a result.
| School | Students | Low-income | Proficient |
|---|---|---|---|
| Mariposa Elementary this school | 537 | 94.8% | 28.8% |
| San Jacinto Elementary San Jacinto | 519 | 94.2% | 14.2% |
| Lankershim Elementary Highland | 551 | 97.1% | 18.2% |
| Beulah Payne STEAM Academy Inglewood | 554 | 93.5% | 21.8% |
| Theodore Roosevelt Paramount | 491 | 92.7% | 27.8% |
| Chaparral Hills Elementary Moreno Valley | 547 | 93.8% | 27.3% |
Matched among California elementary schools on enrollment, the share of students from low-income families (eligible for free or reduced-price lunch), and racial and ethnic makeup. Proficient is the average share of students meeting the state standard across all of the school's state tests in 2023-24 and 2024-25, the same combined score our test-score rankings use. Online schools and schools serving specialized populations are not matched.
Where Mariposa Elementary ranks
Among elementary schools| Measure | This school | In California | In San Bernardino County |
|---|---|---|---|
| State test proficiency ranked highest first | 28.8% | #3,661 of 5,151 | #178 of 318 |
| Math proficiency ranked highest first | 24.4% | #3,829 of 5,172 ▼ 646 | #185 of 321 ▼ 46 |
| Reading proficiency ranked highest first | 26.9% | #4,283 of 5,172 ▼ 795 | #244 of 321 ▼ 69 |
| 3-year test score change ranked biggest gain first | +8.4pp | #856 of 5,116 | #53 of 318 |
| Enrollment ranked largest first | 537 | #2,008 of 5,915 | #166 of 340 |
| Students per teacher ranked fewest first | 21.5:1 | #1,814 of 5,352 | #86 of 328 |
| Diversity index ranked most diverse first | 25.6% | #4,152 of 5,354 | #241 of 328 |
| Free and reduced lunch ranked highest share first | 94.8% | #476 of 5,625 | #29 of 331 |
| Enrollment change since 2017-18 ranked steepest decline first | -16.2% | #1,879 of 3,837 | #116 of 246 |
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
537
-117 (-18%) vs 2020
-26% since 1990-91, when it was 728
Student : Teacher
21.5:1
was 25.1:1
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 | 537 | 25 | 21.5:1 | 95% (509) |
| 2023-24 | 567 | 26 | 21.8:1 | 95% (541) |
| 2022-23 | 591 | 26.1 | 22.6:1 | 93% (547) |
| 2020-21 | 654 | 26 | 25.1:1 | 93% (606) |
| 2017-18 | 641 | 26 | 24.6:1 | 87% (559) |
| 2015-16 | 700 | 29 | 24.1:1 | 89% (625) |
| 2010-11 | 843 | N/A | N/A | 92% (774) |
| 2000-01 | 1,027 | 45 | 22.8:1 | 94% (967) |
| 1990-91 | 728 | 30 | 24.3:1 | N/A |
Source: NCES Common Core of Data. Rows are the federal collections on file for Mariposa Elementary.
Since 2017-18: students down 16% (641 to 537); teachers down 4% (26 to 25).
About Mariposa Elementary
Mariposa Elementary is a mid-sized elementary school in Ontario, California, administered by Ontario-Montclair. Its enrollment is 537 students, spread over kindergarten through 6.
Mariposa Elementary is one school in Ontario-Montclair, a system of 33 schools with 17,640 students.
Roughly 86% of students at Mariposa Elementary are Hispanic. Smaller groups are 10% Black and 2% White. County-wide, 55% of San Bernardino County residents are Hispanic. The diversity index for Mariposa Elementary is 26%. For US public schools as a whole it is 70%.
The school's 25 full-time-equivalent teachers translate to a student-to-teacher ratio of 21.5:1. Statewide, elementary schools in California average 22.3:1. Income data for the school show 95% of students eligible for free or reduced-price lunch. Public schools in San Bernardino County average 74%.
On the allk12 Grade, Mariposa Elementary lands at B-, ahead of 47% of California public elementary schools.
The school's average proficiency rate across its state test results is 28.8%. For its free or reduced-price lunch share, the predicted value is 24.0%.
In the surrounding county, San Bernardino County, the median household earns about $85,478 a year, 23% of adults hold a bachelor's degree or higher, and about 11% of residents live below the federal poverty line. Counting Mariposa Elementary, San Bernardino County has 583 public schools.
Ray Wiltsey Middle is about 0.2 miles from Mariposa Elementary, the shortest distance to any other public school. The five-mile area around Mariposa Elementary holds at least 8 other public schools. Mariposa Elementary comes in 5th of 7 nearby schools on average proficiency.
The school's federal locale classification is City: Mid-size.
Enrollment was 537 in 2024-25. In 2020-21, it was 654. Its ratio of students to teachers was 25.1:1 in 2020-21, and 21.5:1 in 2024-25.
The Mariposa Elementary discussion page is a place for homework, tutoring, and testing dates. You can also rate the school on this page.
San Bernardino County at a glance
View full county profilePopulation
2,197,104
Census ACS
Median income
$85,478
Household, ACS
Bachelor's+
23%
Adults 25+
Poverty rate
11%
Below federal line
Schools in county
583
393,648 students
Quick facts
Related schools
Other schools in Ontario-Montclair
- Central Language AcademyElementary · 736 students
- Edison ElementaryElementary · 736 students
- Ray Wiltsey MiddleMiddle · 727 students
- Oaks MiddleMiddle · 668 students
- Serrano MiddleMiddle · 657 students
- Richard Haynes ElementaryElementary · 641 students
Other schools in Ontario
- Chaffey HighHigh · 3,127 students
- Colony HighHigh · 2,109 students
- Ontario HighHigh · 1,994 students
- Park View ElementaryElementary · 844 students
- Ranch View ElementaryElementary · 738 students
- Central Language AcademyElementary · 736 students
Other Mariposa Elementary schools
5 other US public schools in 2 states are named Mariposa Elementary. Mariposa Elementary is the 3rd largest of the 6.
- Mariposa ElementaryLancaster, CA · 732 students
- Mariposa ElementaryBrea, CA · 504 students
- Mariposa ElementaryRedlands, CA · 432 students
- Mariposa ElementaryMariposa, CA · 386 students
- MARIPOSA ELEMENTARY SCHOOLPORT ST LUCIE, FL · 792 students
Nearby schools
- Ray Wiltsey Middle0.2 mi · 727
- Del Norte Elementary0.5 mi · 428
- Corona Elementary0.8 mi · 414
- Lincoln Elementary1.0 mi · 530
- Vineyard Elementary1.1 mi · 562
- Valley View High (Continuation)1.2 mi · 370
Frequently asked questions
About Mariposa ElementaryHow large is Mariposa Elementary?
Mariposa Elementary enrolls approximately 537 students in grades KG-06.
What grades does Mariposa Elementary serve?
Mariposa Elementary serves grades KG-06.
How many teachers does Mariposa Elementary have?
Mariposa Elementary employs 25 FTE teachers, for a student-to-teacher ratio of 21.5:1.
What is the student diversity at Mariposa Elementary?
Student demographics at Mariposa Elementary are roughly 2% White, 86% Hispanic, 10% Black, 1% Asian, 1% Two or more.
What district is Mariposa Elementary in?
Mariposa Elementary is part of Ontario-Montclair.
Data sourceSchool profile facts are sourced from the NCES. Community content is posted by allk12 members.