Summary:
Casa Grande Union High School District has three high schools serving grades 9–12: two with about 1,900 students each and one much smaller school, Pace, with 83. Across the two schools with reportable results, all-grades AASA proficiency averaged 26% in ELA and 26% in math, compared with state rates of 41% and 33%. The central concern is that both reporting schools trail the state, with the largest gap in ELA: 16 percentage points below.
Vista Grande High School stands out in ELA and math, while Casa Grande Union High School leads in science. Vista Grande’s all-grades results are 28% in ELA and 29% in math, 5 and 7 points above Casa Grande Union’s 23% and 22%; Casa Grande Union’s 11th-grade science result is 15%, 3 points above Vista Grande’s 12%. Vista Grande also reports stronger completion measures: an 85% graduation rate versus 82%, and a 4% dropout rate versus 5%. Pace has the lowest student–teacher ratio, 16.6 compared with 22.4 at Vista Grande and 21.9 at Casa Grande Union, but that alone does not show how it performs academically. Pace’s test scores are suppressed, so its academic standing cannot be compared here.
SchoolDigger’s statewide percentile rankings have risen for both larger schools, especially Vista Grande. Vista Grande moved from the 16th percentile in 2023–24 to the 42nd in 2025–26, a gain of 26 percentile points; Casa Grande Union rose from the 23rd to the 29th, a gain of 6 points. The two schools are close in size and student–teacher ratio, yet their subject results differ, so families may weigh Vista Grande’s stronger ELA and math results against Casa Grande Union’s science lead. The rankings reflect relative standing, not a measured year-to-year change in test proficiency.
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