Annex Charter School

402 Annex Rd, Ontario, OR 97914

BSchola Grade
Grades
K–12
Other
Students
131
Enrolled 2024–25
Students per teacher
16.4 : 1
Full-time teachers
District
Annex SD 29
Malheur County

Schola Grade B · Above average

Letter grade (A–F) · compared with 63 Oregon K–8, K–12 and other combined schools · How we grade
Test scores44% proficient in math & reading
65thpercentile
Equity44% of low-income students proficient
66thpercentile
Attendance23% chronically absent
73rdpercentile
Class size16.4 students per teacher
51stpercentile

Percentiles compare this school with other Oregon K–8, K–12 and other combined schools; the line marks the middle. Data: test scores 2021–22, graduation and absenteeism 2022–23 (U.S. Department of Education, EDFacts); coursework 2023–24 (Civil Rights Data Collection); staffing 2024–25 (NCES).

About Annex Charter School

Annex Charter School is a charter school in Ontario, Oregon, serving grades K–12. It is part of Annex SD 29. The school is located in a rural area near a town in Malheur County.

In the 2024–25 school year, 131 students were enrolled, with about 16.4 students for every full-time teacher. As a charter school, it is publicly funded and tuition-free, but operates independently of the local district under a charter from Annex SD 29. Its Schola Grade is B (above average), compared with 63 Oregon K–8, K–12 and other combined schools.

Grades & enrollment

Students per grade, 2024–25Grades K–12

Location & nearby schools

402 Annex Rd
Ontario, OR 97914
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School details

Type
Charter School · What this means
Level
Other
Grades offered
K–12
Enrollment (2024–25)
131 students
Students per teacher
16.4 to 1
Charter school
Yes
Charter authorizer
Annex SD 29
Magnet school
No
Virtual learning
Offers virtual courses
Locale
Rural — Fringe
School district
Annex SD 29
County
Malheur County
NCES school ID
410135000753

Schools near Annex Charter School

All 8 schools in Ontario →

School data comes from the U.S. Department of Education: the National Center for Education Statistics (NCES) Common Core of Data and EDGE school locations (2024–25) and Private School Survey (2023–24), the Civil Rights Data Collection (2023–24), and EDFacts (test results 2021–22; graduation and chronic absenteeism 2022–23), plus other public sources. Please contact the school to confirm enrollment, programs, and other details. How we source data.