Milestones Charter School

Milestones Charter School is the only school in this list, serving grades K–8 in Phoenix, with 186 students. Its SchoolDigger rating is four stars, and there is no second school here to compare with it. The clearest overall finding is that Milestones’ all-grades proficiency is well above Arizona’s in both reported subjects: 63% in English Language Arts (ELA) versus 41% statewide, and 65% in math versus 33% statewide.

Milestones’ strongest reported result is 3rd-grade math: 75% proficient, 37 percentage points above Arizona. Its lowest reported result is 4th-grade ELA at 54%, still 7 points above the state. The other reported grade-level results are also higher than their state comparisons: 7th-grade ELA is 72% versus 43%, a 29-point lead, and 4th-grade math is 63% versus 40%, a 23-point lead. Overall, math is the school’s stronger subject relative to the state: its 32-point advantage is 10 points larger than its 22-point ELA advantage, even though the school’s own math and ELA rates are only 2 points apart. Its average across the two subjects is 64%, compared with Arizona’s 37%.

SchoolDigger’s relative ranking improved and then declined, but those rankings do not show whether test scores changed over time. The school’s percentile was 90 in 2023–24 (ranked 87th of 912), rose to 96 in 2024–25 (36th of 909), then fell to 82 in 2025–26 (159th of 900)—8 percentile points below its 2023–24 level. Within the reported grade results, the size of the state advantage varies, from 7 points in 4th-grade ELA to 37 points in 3rd-grade math. The reported student–teacher ratio is 13.2; without another school in the list, it cannot be compared locally. Because this list contains only one school, it cannot show a school-to-school range or identify a local top or bottom.