Summary:
Ontario School District 8C has a single high school: Ontario High School, located at 1115 W Idaho Ave in Ontario, Oregon. It serves grades 9–12 and enrolls 709 students, making it a mid-to-large Oregon high school. Because it is the district's only high school, the high-school figures reported for Ontario School District 8C are the same students counted twice — so the most meaningful comparisons for families are against Oregon statewide averages.
Two areas stand out positively. The four-year graduation rate is 88.8%, above Oregon's 83.0%. Chronic absenteeism is 26.6%, better than the state's 33.5%, though higher than the district's K–12 average of 18.7%, which suggests attendance challenges are concentrated at the high school level. Among tested subjects, science is the relative bright spot: 19.3% proficient, slightly above the district's 17.4%, but still below the state's 30.6%. English language arts proficiency is 27.7% at both all grades and 11th grade, compared with 43.8% statewide.
Mathematics is the biggest concern. Proficiency is reported as under 5% at both all grades and 11th grade — a bound rather than an exact figure — against 32.9% statewide (all grades) and 22.9% at grade 11. The district's 11th-grade math figure is also under 5%, so this pattern is district-wide rather than isolated to one building. Families should also note that 100% of students qualify for free or reduced-price lunch, per-student spending is $22,143, and the student–teacher ratio is 17.7, implying roughly 40 teachers. The school holds a 1-star rating and ranks 234th of 271 Oregon high schools — the 14th percentile — down from the 28th percentile two years ago. In short, Ontario High School keeps students in class and graduates them above the state average, while proficiency results, especially in math, remain among the lowest reported in Oregon.
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