Enrollment
533
Idaho · 2024-25 NCES data
Other / mixed grade configuration · Ammon, ID
Rimrock Elementary
Federal NCES profile for Rimrock Elementary, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 27/100.
2024-25 NCES dataOther / mixed grade configurationNCES 160093000909
👥 S:T ratio 11
🌟 Gifted program 70
🎓 Counselors 0
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Rimrock Elementary earns 27/100 on the Resource Investment Index, with class sizes larger than 89% of Idaho schools.
- #7 of 7
- schools in Ammon · Resource Index
- 27
- Resource Index · Lower
- 22.2:1
- large classes for Idaho
- 9.1%
- free-lunch eligible
Rimrock Elementary has class sizes larger than 89% of Idaho schools. Computed live against every Idaho school reporting to NCES.
By Resource Investment Index, Rimrock Elementary ranks #7 of 7 schools in Ammon, ID.
School address
District: Bonneville Joint District · Idaho
NCES ID 160093000909 Verify on NCES CCD record →
Teachers (FTE)
24.0
Federal CCD staff survey
Students per teacher
22.2:1
vs 17.1:1 Idaho avg
+30% vs state
Free-lunch eligible
9.1%
vs 29.3% Idaho avg
-69% vs state
Student-teacher ratio in context
How Rimrock Elementary compares with Idaho and U.S. medians
What stands out at Rimrock Elementary
Rimrock Elementary is a lower-poverty, mid-sized combined-grade school in Ammon, Idaho, enrolling 533 students.
Class loads run heavy: 22.2:1 is larger than about 89% of Idaho schools and 30% above the 17.1:1 state mean, so each teacher carries more students than is typical.
Comparatively few students face economic hardship here, 9.1% free-meal eligibility runs 69% below the Idaho average.
Enrollment of 533 puts it in the larger third of Idaho schools by headcount.
Its Resource Investment Index lands in the lower third of 775 scored Idaho schools.
Among 136 similarly sized, similarly resourced-need Idaho schools statewide, it ranks #116, in the lower tier once campus size and economic need are matched.
Its student body is predominantly White (92% of enrollment) (diversity index 16/100).
Counselor access is stretched at roughly 533 students per counselor, well above the ASCA-recommended 250:1 ceiling.
The surrounding Bonneville Joint District spends $8,318 per pupil, 30% below the Idaho average, a leaner-resourced district than most.
Its district draws 16.4% of revenue from federal sources, an above-typical federal share that tends to track a higher-need student population.
Bonneville Joint District also operates Thunder Ridge High School (1,693 students) and Hillcrest High School (1,230 students) alongside Rimrock Elementary.
Sourced from NCES CCD, CRDC, and F-33 (federal records, not a quality verdict). How we source and compute this.
Source: National Center for Education Statistics Common Core of Data + CRDC + F-33 · 2024-25
How Rimrock Elementary compares
Rimrock Elementary on the metrics families compare, against Idaho and U.S. means.
| Metric | This school | vs Idaho | Idaho avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 22.2:1 | ▲ 30% | 17.1:1 | 15.7:1 |
| Free-lunch eligible | 9.1% | ▼ 69% | 29.3% | 51.7% |
| Enrollment | 533 | top 21% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
22.2:1
Leaner classes than 10% of US schools, heavier class loads than most.
533
Bigger than 66% of US schools by enrollment, mid-sized for the country.
Equity indicators (what these measure)
Economic need
9.1%
free-lunch eligible
- 69% below the Idaho average of 29.3%
Below the 40% Title I threshold, among the lower-need profiles in the state; federal aid targets individual qualifying students rather than schoolwide programs.
Staffing depth
22.2:1
students per teacher
- 30% above state mean
Top 89% in Idaho - lower ratio than 11% of state schools
Above 20:1, running heavier than the typical U.S. public school; staffing is comparatively stretched.
Funding equity
$8,318
per pupil, district-wide
- below Idaho avg of $11,939
Well below the U.S. average per-pupil spend, a notably leaner funding position that may affect programs, facilities, and staffing.
Support staff
Counselors1.0 FTE
Per 533 students, the combined health-and-guidance staffing load for this school.
Discipline context
0
in-school suspensions + 0 out-of-school
Suspension rate: 0.0 per 100 students. Combined in-school and out-of-school rate: 0.0 per 100 students. Reported via the Civil Rights Data Collection.
Overview
- Common Core of Data (June 2026): enrollment, staffing, and the student-teacher ratio above.
- Civil Rights Data Collection: discipline counts and program access (AP, gifted, special education).
- F-33 School District Finance Survey: the district-wide per-pupil spending figures below.
Three separate federal collections, each on its own reporting cadence - which is why this school's numbers line up on a consistent basis against every other school and state on this site, rather than mixing figures pulled from different survey years.
Student demographics
White 91.7%
Hispanic or Latino 5.1%
Two or More 1.9%
American Indian / Alaska Native 0.6%
African American 0.4%
Asian 0.4%
Largest group: White at 91.7% of enrollment.
Student-body diversity index 15.6/100
Simpson diversity index - at 15.6, Rimrock Elementary is less mixed than the Idaho school average of 36.3.
Programs
Gifted & talented Yes
Funding & spending
District-wide per-pupil expenditure for Bonneville Joint District, which includes Rimrock Elementary.
$8,318
Per student
-30%
vs Idaho
Avg $11,939
-50%
vs U.S.
Avg $16,593
Revenue mix
Local 19.2%
State 64.4%
Federal 16.4%
Source: NCES F-33 School District Finance Survey District-level finance · FY 2021-22 Per-pupil expenditure reflects the district-wide average. Individual school budgets are not reported at the federal level.
How Rimrock Elementary Compares to District-Mates
| School | Enrollment | Economic Profile | Student-Teacher Ratio |
|---|---|---|---|
| Thunder Ridge High School | Larger | Similar economic need | Similar S:T ratio |
| Hillcrest High School | Larger | Similar economic need | Higher S:T ratio |
| Bonneville High School | Larger | Similar economic need | Similar S:T ratio |
| Black Canyon Middle School | Larger | Higher economic need | Lower S:T ratio |
| Iona Elementary School | Similar size | Similar economic need | Similar S:T ratio |
Comparisons are relative to Rimrock Elementary's own figures; each column derives from NCES Common Core of Data.
Other Schools in This District
- Enrollment
- 1,693
- Students per teacher
- 22.3:1
- Resource Index
- 32/100
- Enrollment
- 1,230
- Students per teacher
- 24.6:1
- Resource Index
- 30/100
- Enrollment
- 1,176
- Students per teacher
- 23.1:1
- Resource Index
- 33/100
- Enrollment
- 810
- Students per teacher
- 19.8:1
- Resource Index
- 37/100
- Enrollment
- 661
- Students per teacher
- 23.6:1
- Resource Index
- 25/100
Similar other schools statewide
Matched by enrollment size and by staffing ratio across all of Idaho, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~533 students)
Next steps
Verify locally before acting on Rimrock Elementary's federal record.
- Compare Rimrock Elementary against another school. Compare schools
- Bonneville Joint District's spending and staffing shape this school. District profile
- Confirm current enrollment and boundaries with the school. Choosing guide
Federal record (CCD 2024-25, CRDC 2021-22) - PlainSchools assigns no subjective rating; the composite quality score is a transparent, reproducible index computed from this cited federal data.
Frequently asked questions about Rimrock Elementary
How many students attend Rimrock Elementary?
Rimrock Elementary has 533 students enrolled. It is a public school in Ammon, ID.
What is the student-teacher ratio at Rimrock Elementary?
The student-teacher ratio at Rimrock Elementary is 22.2:1, which is 30% higher than the Idaho average of 17.1:1 and 41% higher than the national average of 15.7:1.
What percentage of students receive free lunch at Rimrock Elementary?
9.1% of students at Rimrock Elementary are eligible for free lunch, compared to the Idaho average of 29.3%.
What is the racial and ethnic makeup of Rimrock Elementary?
The largest demographic group at Rimrock Elementary is White at 91.7% of enrollment, in Ammon, ID.
What is the Resource Investment Index for Rimrock Elementary?
Rimrock Elementary has a Resource Investment Index of 27/100 (lower reported resources relative to schools nationally) based on 3 factors: student-teacher ratio, counselor availability. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Rimrock Elementary rank among schools in Ammon?
By Resource Investment Index, Rimrock Elementary ranks #7 of 7 schools in Ammon, ID. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all schools in Ammon on the city page.
Is Rimrock Elementary a good school?
Rimrock Elementary earns 27/100 on the Resource Investment Index, with class sizes larger than 89% of Idaho schools. This is a resource snapshot, not an academic rating; see the Resource Investment Index question above for what the number does and doesn't measure.
What other schools are in Bonneville Joint District?
Besides Rimrock Elementary, Bonneville Joint District also operates Thunder Ridge High School (1,693 students), Hillcrest High School (1,230 students), and Bonneville High School (1,176 students). See the Bonneville Joint District district page for the complete list.
Related tools
Every figure on PlainSchools is rendered directly from the source NCES, CRDC and F-33 federal records, no number is typed in by an editor. Each school's figures reflect its most recent NCES/CRDC submission on file. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of June 2026.