Summary:
Zip code 82935 has two high schools in Green River, Wyoming, both serving grades 9–12: Green River High School and Expedition Academy. In the latest reported results, Green River leads Expedition in every grade and subject with a comparable proficiency result.
Green River High School stands out for stronger proficiency and a higher SchoolDigger statewide ranking: it placed 31st of 81 high schools, with 3 stars, compared with Expedition’s 78th place and 0 stars. In 10th grade, Green River’s proficiency rates were 69.8% in English language arts (ELA), 45.6% in math and 58.8% in science; each was above Expedition Academy’s 18.2%. The gaps were 51.6 percentage points in ELA, 27.4 in math and 40.6 in science. Green River also led in 9th-grade ELA, 62.5% to 25%, and its 36.2% in math was more than 26.2 points above Expedition’s under 10%.
Recent results show the schools moving in different directions: Green River improved in all three 10th-grade subjects from 2024–2025 to 2025–2026, while Expedition’s ELA fell 23.5 points and science fell 15.1, with math edging up 1.5 points. SchoolDigger’s ranking history also shifted upward for Green River, from the 54th percentile in 2023–2024 to the 62nd in 2025–2026; Expedition moved from the 13th percentile in 2024–2025 to the 4th. The schools differ in size and other circumstances too: Green River enrolls 757 students, compared with Expedition’s 35, while their student-teacher ratios are 17.2:1 and 6.5:1, respectively. Expedition’s reported free/reduced-lunch eligible share was 48.6%, versus 32.2% at Green River; these are contextual differences, not explanations for test results. Graduation rates were closer: 87.0% at Green River and 83.3% at Expedition in 2024–2025.
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