Summary:
Zip code 57730 has one listed elementary school, Custer Elementary - 02, serving prekindergarten through grade 6 with 269 students. With no other elementary schools in the list, families can compare Custer’s results with district and state figures, but not with another local school. The clearest overall finding is that Custer’s 2025–2026 proficiency was above the state average in both subjects, especially in mathematics: 69% versus 44% statewide, a 25-point advantage.
There is no within-area top or bottom school to distinguish, but results differ noticeably by grade. Custer’s all-grades ELA proficiency was 57%, 8 points above the state, while grade 3 ELA was a weaker spot at 35%, 8 points below the state’s 43%. In contrast, grade 6 math was especially strong: 85%, or 43 points above the state. Math was above state results in every reported grade, and fifth-grade science was also strong at 63%, 21 points above the state. These grade differences show why the overall averages do not tell the whole story.
Recent trends diverged by subject: from 2024–2025 to 2025–2026, Custer’s ELA result fell 6 points and its advantage over the state narrowed by 4 points; math rose 9 points, widening its state advantage by 8 points. Fifth-grade science fell 3 points, and its state advantage narrowed by 4 points, though it remained substantial. SchoolDigger ranked Custer 34th of 203 statewide, at the 83rd percentile with four stars in 2025–2026; in 2024–2025 it ranked 43rd of 300, also with four stars. As additional context, its student-teacher ratio was 10.3 to 1, 34% of students were free/reduced lunch eligible in 2024–2025, and chronic absenteeism was 7% in 2025–2026, compared with 16% in the Custer School District 16-1 and 20% statewide.
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