Enrollment
131
Oregon · 2024-25 NCES data
Elementary school (grades K-5) · Ontario, OR
Annex Charter School
Federal NCES profile for Annex Charter School, including enrollment, faculty, free-lunch eligibility, demographics, and resource indicators - Resource Investment Index 40/100.
2024-25 NCES dataElementary school (grades K-5)NCES 410135000753Charter school
👥 S:T ratio 42
🌟 Gifted program 30
🎓 Counselors 65
📋 Attendance 22
Scored 0–100 from federal NCES and CRDC indicators, resource allocation, not test scores. Full methodology →
The verdict
Annex Charter School earns 40/100 on the Resource Investment Index, with class sizes smaller than 77% of Oregon schools.
- #3 of 6
- elementary schools in Ontario · Resource Index
- 40
- Resource Index · Typical
- 14.6:1
- small classes for Oregon
- 69.5%
- free-lunch eligible
Annex Charter School has class sizes smaller than 77% of Oregon schools. Computed live against every Oregon school reporting to NCES.
By Resource Investment Index, Annex Charter School ranks #3 of 6 elementary schools in Ontario, OR.
School address
Teachers (FTE)
9.0
Federal CCD staff survey
Students per teacher
14.6:1
vs 17.6:1 Oregon avg
-17% vs state
Free-lunch eligible
69.5%
vs 52.8% Oregon avg
+32% vs state
Student-teacher ratio in context
How Annex Charter School compares with Oregon and U.S. medians
What stands out at Annex Charter School
Annex Charter School is a higher-need, small charter elementary school in Ontario, Oregon, enrolling 131 students.
Class sizes run a bit leaner than typical: 14.6:1 puts it in the smaller third of Oregon schools by student-teacher ratio.
Economic need runs somewhat above the state's typical profile, with 69.5% of students eligible for free meals.
Enrollment of 131 puts it in the smaller third of Oregon schools by headcount.
Its Resource Investment Index lands in the upper third of 1,273 scored Oregon schools.
Against 57 statewide peers matched on enrollment and economic need, it ranks in the upper tier at #17.
Its student body is led by White (76%) and Hispanic or Latino (22%) (diversity index 38/100).
Counselor coverage is strong, about 175 students per counselor, inside the American School Counselor Association's recommended 250:1.
Chronic absenteeism is elevated: 31.3% of students missed 10% or more of school days (2021-22 Civil Rights Data Collection).
The federal civil-rights collection also records 1 expulsion at this campus for 2021-22.
Among Ontario's elementary schools, it stands alongside Alameda Elementary School (355 students): Annex Charter School is smaller than that campus by headcount and runs leaner classes (14.6:1 vs 17.8:1).
Annex Sd 29 is a single-school charter district, so Annex Charter School operates independently rather than alongside district-mates.
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 Annex Charter School compares
Annex Charter School on the metrics families compare, against Oregon and U.S. means.
| Metric | This school | vs Oregon | Oregon avg | U.S. avg |
|---|---|---|---|---|
| Students per teacher | 14.6:1 | ▼ 17% | 17.6:1 | 15.7:1 |
| Free-lunch eligible | 69.5% | ▲ 32% | 52.8% | 51.7% |
| Enrollment | 131 | top 86% | - | - |
Source: NCES Common Core of Data School-level CCD + state/national means from Public School Universe · 2024-25
14.6:1
Leaner classes than 51% of US schools, a middle-of-the-pack class size.
131
Bigger than 13% of US schools by enrollment, a small campus.
Equity indicators (what these measure)
Economic need
69.5%
free-lunch eligible
- 32% above the Oregon average of 52.8%
Above the 40% Title I schoolwide threshold; federal funds support the whole school, not individual students.
Staffing depth
14.6:1
students per teacher
- 17% below state mean
Top 23% in Oregon - lower ratio than 77% of state schools
Close to the 15:1 benchmark most often cited for individualized attention.
Engagement
31.3%
chronically absent (missed 10%+ of school days)
At or above 20%, the commonly used threshold for "high" chronic absenteeism, signaling significant barriers to regular attendance.
Funding equity
$19,687
per pupil, district-wide
- above Oregon avg of $18,086
Somewhat above the U.S. public-school average, reflecting higher local or state investment per enrolled student.
Support staff
Counselors0.8 FTE
Student-support staffing from the Civil Rights Data Collection.
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. Includes 1 expulsion.
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 75.6%
Hispanic or Latino 22.1%
Two or More 2.3%
Largest group: White at 75.6% of enrollment.
Student-body diversity index 37.9/100
Simpson diversity index - at 37.9, Annex Charter School is less mixed than the Oregon school average of 47.1.
Programs
Funding & spending
District-wide per-pupil expenditure for Annex Sd 29, which includes Annex Charter School.
$19,687
Per student
+9%
vs Oregon
Avg $18,086
+19%
vs U.S.
Avg $16,593
Revenue mix
Local 11.9%
State 77.1%
Federal 11.0%
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.
Similar elementary schools in Ontario
5 comparable elementary schools (grades K-5) serving the same city.
Alameda Elementary School
Standard public school
355 students 17.8:1 students per teacher
Aiken Elementary School
Standard public school
333 students 23.8:1 students per teacher
May Roberts Elementary School
Standard public school
302 students 12.1:1 students per teacher
Cairo Elementary School
Standard public school
109 students 13.6:1 students per teacher
Pioneer Elementary School
Standard public school
90 students 15:1 students per teacher
Similar elementary schools statewide
Matched by enrollment size and by staffing ratio across all of Oregon, not just this city - a different peer set than the local comparisons above.
Similar enrollment (~131 students)
Next steps
Verify locally before acting on Annex Charter School's federal record.
- Compare Annex Charter School against another school. Compare schools
- Annex Sd 29'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 Annex Charter School
How many students attend Annex Charter School?
Annex Charter School has 131 students enrolled. It is an elementary school in Ontario, OR.
What is the student-teacher ratio at Annex Charter School?
The student-teacher ratio at Annex Charter School is 14.6:1, which is 17% lower than the Oregon average of 17.6:1 and 7% lower than the national average of 15.7:1. Lower ratios generally mean more individual attention per student.
What percentage of students receive free lunch at Annex Charter School?
69.5% of students at Annex Charter School are eligible for free lunch, compared to the Oregon average of 52.8%.
What is the racial and ethnic makeup of Annex Charter School?
The largest demographic group at Annex Charter School is White at 75.6% of enrollment, in Ontario, OR.
What is the Resource Investment Index for Annex Charter School?
Annex Charter School has a Resource Investment Index of 40/100 (typical reported resources relative to schools nationally) based on 4 factors: student-teacher ratio, counselor availability, attendance rates. Not a test-score or academic measure (national median ~41/100, see methodology).
How does Annex Charter School rank among elementary schools in Ontario?
By Resource Investment Index, Annex Charter School ranks #3 of 6 elementary schools in Ontario, OR. This compares federal resource and staffing data among local peers; it is not a test-score or academic ranking. See all elementary schools in Ontario on the city page.
Is Annex Charter School a good school?
Annex Charter School earns 40/100 on the Resource Investment Index, with class sizes smaller than 77% of Oregon 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 Annex Sd 29?
None; Annex Sd 29 is a single-school charter district, and Annex Charter School is its only campus.
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.