Summary:
ZIP code 83539 is home to one high school: Clearwater Valley Junior/Senior High School in Kooskia, Idaho, part of the Mountain View School District. This small rural school serves 169 students in grades 7 through 12 with a 12.1-to-1 student-teacher ratio, and just over 58% of students qualify for free or reduced-price lunch. Per-pupil spending is relatively high at $15,874, reflecting the fixed costs common to small rural districts.
Academic performance at Clearwater Valley is mixed. The school's state ranking has fluctuated, dropping from the 41st percentile in 2023–2024 to the 21st percentile in 2024–2025, before recovering to the 27th percentile in 2025–2026, where it currently holds a 1-star rating. Eighth grade math is a clear bright spot: 43.5% proficiency in 2025–2026, beating both the district (40.0%) and state (41.2%). However, End-of-Course science lags badly at 29.6% proficiency versus 41.2% statewide. ELA results are inconsistent by grade, with 7th grade scoring relatively well but 8th grade and End-of-Course results trailing district and state averages.
Attendance and graduation tell a more encouraging story in part. Chronic absenteeism affects 22.1% of students, well above the district's 15.6% and the state's 13.8%, which likely dampens test performance in a school this small. Yet the graduation rate of 82.5% exactly matches both the district and state averages, showing students who stay enrolled complete school at the same rate as peers across Idaho. Overall, Clearwater Valley demonstrates that success is possible despite economic disadvantage and absenteeism challenges, but addressing attendance and upper-level science will be critical to improving its ranking.
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