The top reported proficiency rate is 79% in Math. The lowest is 78% in English language arts.
Original Research by School Decision on Cider Mill School
Cider Mill School serves the elementary grades three through five in Wilton, a residential community in Fairfield County, and is part of the Wilton School District. The school has an enrollment drawn from a solidly middle-class suburb where the housing market reflects well-above-state and national benchmarks, and family income and stability are comparatively high.
The school's most recent state assessment results, from spring 2025, show proficiency rates in the low-to-mid 70s across the tested grades in math and English language arts, with one subject area standing notably higher. In math, proficiency is consistent across grades three through five, hovering around three-quarters of students. English language arts shows more variation by grade: students in grade three fall into the low 70s in proficiency, those in grade four rise to the mid-70s, and students in grade five reach the high 80s. Science proficiency, tested only in grade five, is near 80 percent. The school's overall proficiency index places it above the midpoint when compared against other districts in the Western Connecticut Planning Region. Participation in testing is near-universal across all grades and subjects. The school's multi-year data includes only the current year, so trend information is unavailable.
The student body is predominantly white, with an Asian enrollment that is somewhat higher than state or national norms, and smaller shares of Hispanic, multiracial, and Black students. Free and reduced lunch status and counts of students with IEPs or English learner designations are not publicly reported for this school. The school's enrollment spans roughly equal numbers across the three grades it serves.
Wilton itself is a quiet, two-acre-zoned suburban town with a rural feel defined by winding roads, preserved open space, and numerous historic homes. The town center, anchored by the Wilton Library, has undergone recent development to create a more walkable downtown, aided by a pedestrian bridge opened in 2023 that connects the Metro-North train station to the commercial district and the Norwalk River Valley Trail. Wilton is drawing significant new residential development, particularly along the Route 7 corridor near the station, with multi-unit projects that are shifting the community's long-term character toward more density and demographic diversity.
The Wilton School District recently made a significant change to how it teaches reading in the early grades. In response to Connecticut's Right to Read law, which mandates Science of Reading-aligned instruction in grades K-3, Wilton moved away from its long-standing balanced literacy approach and adopted the Imagine Learning program. Full compliance was required by the 2025-26 school year. This is a foundational pedagogical shift that directly affects instruction at this school. The district also became phone-free in 2024, restricting student cellphone use during the school day, shaping the daily classroom experience.
Housing values in Wilton's zip code are well above both state and national medians, and the affordability data indicates a steep price relative to household income. Rental costs are proportionally high as well, running substantially higher than what median household income would support through the conventional 30 percent rent-to-income rule. Families considering this area are choosing a community where both purchase and rental housing place significant demands on household budgets.
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