Summary:
Zip code 97818 covers Boardman, Oregon, and contains exactly one public high school: Riverside Junior/Senior High School, a combined junior/senior high serving grades 7–12 with 520 students. It belongs to Morrow School District 1. Because this is the only high school in the area, there are no neighboring schools to compare it against — the meaningful comparisons are to its own district and to Oregon statewide averages. It is a mid-sized, rural school where roughly 67.7% of students qualify for free or reduced-price lunch.
Academically, the school's results are split sharply by grade level. In the 2025‑2026 state tests, 11th graders performed close to state norms — 45.0% proficient in English language arts versus 46.0% statewide, and 35.0% in science versus 33.8% statewide, which also beats the district's 33.7%. But 7th and 8th graders trail far behind: 7th-grade math sits at 7.7% proficiency against a state figure of 33.3%, and 7th-grade English at 18.2% against 45.3%. Overall, the school posts 29.9% in English, 13.2% in math, and 22.6% in science — below state in every subject.
Two results stand out most for families. First, the graduation rate is 100.0%, well above the district's 96.7% and Oregon's 83.0%. Second, chronic absenteeism is 38.1% — about two in five students missing 10% or more of school days — above both the district (35.4%) and the state (33.5%). The school also improved its statewide standing, moving from the 22nd percentile in 2024‑2025 to the 49th percentile (139th of 271 schools, 2 stars) in 2025‑2026. Per-student spending is $18,277, with a student-teacher ratio of 18.5:1.
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