Summary:
ZIP code 54966, covering Plainfield, Wisconsin, is served by a single elementary school: Tri-County Elementary, a PK–5 school with 265 students in the Tri-County Area School District. Because it is the only elementary school in this area, there is no other local school to compare it with; the most useful benchmarks are the district and the state.
Academically, the school is improving but still working to catch up. Its rank moved from 842 out of 1,061 schools in 2023–2024 to 735 out of 1,039 in 2025–2026, rising from the 21st to the 29th percentile, though it still holds a 1-star rating. English Language Arts showed the strongest gains: the grades 3–5 average rose from 39.34% to 48.92% proficient, cutting the gap to the state from roughly 12.5 points to about 4.3 points, with 4th grade ELA up 14.84 points. Fourth grade Social Studies is the brightest spot at 70.59% proficient, 5.08 points above the state. Math is the clearest concern: the grades 3–5 average stayed nearly flat near 35%, about 19 points below the state, and 3rd grade Math fell 25 points to 25.00% — 29.75 points below the state average. Fifth grade Math improved to 33.33% but remains 18.48 points behind.
Family and resource context matters here. About 64.53% of students are eligible for free or reduced lunch, per-student spending is $15,020, and the student-teacher ratio is 12.4. Chronic absenteeism is 15.2%, lower than the district's 19.4% and the state's 17.3%. Overall, the picture is a school on a positive trajectory in reading, social studies, and attendance, with mathematics — particularly in 3rd and 5th grade — as the area needing the most attention.
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