Summary:
Zip code 73521 has two high schools serving grades 9–12: Altus High School, with 975 students, and Navajo High School, with 119. In 2025–26, their average proficiency was above the state in English Language Arts I but below it in math, science and U.S. History. Science was the clearest area of concern: the schools averaged 13% proficiency, compared with 30% statewide.
Altus High School led the two-school group in three of four subjects: its proficiency was 36% in ELA, 20% in math and 41% in history, respectively 12, 6 and 13 points above Navajo High School. Navajo stood out in science, with 17% proficiency versus Altus’s 9%, though both were below the state’s 30%. Graduation rates were strong at both schools in 2024–25: 88% at Altus and 97% at Navajo, compared with 78% statewide. Navajo also had lower chronic absenteeism in 2025–26: 8% versus 15% at Altus and 16% statewide.
Results changed unevenly between 2024–25 and 2025–26. Navajo’s proficiency fell in all four subjects, including 21 points in ELA and 15 in history; Altus was steady in ELA and math, gained 1 point in history, but fell 7 points in science. The area’s average across the four subjects dropped 6 points, while the state average fell about 1 point. SchoolDigger’s rankings also moved down: Altus went from the 72nd to the 57th percentile, and Navajo from the 75th to the 33rd. For context, Altus had a 20.4 student-teacher ratio and Navajo 16.6; both reported free/reduced lunch eligible for 2024–25, at 52% and 47%, respectively. These figures describe differences between the schools but do not explain their results.
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