Summary:
ZIP code 45312 in Casstown, Ohio contains exactly one middle school — Miami East Junior High School, serving grades 6 through 8 with 327 students in the Miami East Local district. Because it is the only middle school in the area, there are no within-ZIP comparisons to make, but this school's results stand out strongly on their own.
Miami East Junior High is a 5-star school in a 5-star district. The district ranks 56th out of 773 Ohio districts, placing it in the 93rd percentile. The school itself has ranked highly for three straight years, and in 2025–26 it jumped to 46th out of 1,046 ranked Ohio middle schools — roughly the top 4% — up from 99th the prior year, while holding 5 stars all three years. Test scores are a major strength: the school outperformed the Ohio state proficiency rate in every reported subject and grade in both 2024–25 and 2025–26, with gaps ranging from +15.3 to +40.6 percentage points. Algebra I End of Course stands out at 100% proficient in both years, well above the district's 86.2% and the state's 61.6% in 2025–26. Chronic absenteeism is 5.8%, lower than the district's 6.6%, and the student-teacher ratio is 15.1:1. Notably, the school posts these results with a free/reduced-lunch rate of 49.85% in 2024–25 — nearly half the student body — though that measure is only a proxy for economic disadvantage.
On year-over-year movement, most subjects improved: Math 8 rose 13.5 points and ELA 8 rose 13.8 points, helping lift the overall average from 80.5 to 85.65 while the state average rose only about 1.6 points. The main item to watch is 7th grade math, which fell 7.5 points to 75.3 — still 26.7 points above the state. Families should note that spending data is from 2018–19 and scores are percent proficient rather than growth measures, so older figures are not directly comparable.
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