Summary:
High Schools in Marsh Valley Joint District consist of just one school—Marsh Valley High School—a traditional public high school serving grades 9 through 12 in Arimo, Idaho, with 303 students enrolled. The district ranks a solid 25th out of 101 Idaho districts with a 4-star rating, yet the school's own ranking is more modest: 72nd out of 122 high schools (41st percentile) in 2025–2026. That is a notable one-year jump from the prior year's 95th place (15th percentile), suggesting that other schools in the district are likely propping up the district's strong reputation.
Academically, English Language Arts is the school's strongest subject, with 55.1% of students proficient in 2025–2026, slightly above the state average of 54.0%. Math proficiency more than doubled from 19.4% to 40.4% year over year, a striking improvement that parents should interpret with some caution, as the shift could reflect changes in testing administration or data reporting. Science remains the clearest area of concern: only 34.9% of students scored proficient versus the state's 42.7%, and the school also lagged on end-of-course science exams (33.3% vs. 41.2%). The school's graduation rate is exactly average at 82.5%.
Chronic absenteeism is a meaningful red flag, affecting 19.3% of students—well above the district's 16.6% and the state's 13.8%. With a student-teacher ratio of 16.1:1, class sizes are fairly typical, and the school spends about $8,519 per student, though that figure is from 2018–2019 and should be treated as outdated. Overall, Marsh Valley High School shows genuine promise in ELA and recent math gains, but parents should keep an eye on science performance and attendance moving forward.
Thank you for your feedback!