The top reported proficiency rate is 62% in English language arts. The lowest is 48% in Math.
Original Research by School Decision on Southbury Elem School
Southbury Elementary School serves kindergarten through fifth grade in Oswego, a rapidly growing suburban community in Kendall County. The school sits within a district that recently overhauled its core curricula and is now facing a major facilities bond decision that will reshape property-tax burden for families in the area over the next decade.
The school enrolls a diverse student body of roughly 600 children, with a racial and ethnic composition that leans toward white students but includes substantial Asian, Hispanic, and Black enrollment. Grade-level cohorts are fairly even in size, ranging from about 85 to 110 students per grade. Data on free-or-reduced-price lunch eligibility and special education or English learner populations was not provided, so a parent may want to ask the school directly about the economic and academic-support landscape.
On state testing, Southbury's results show mixed performance. In English language arts across third, fourth, and fifth grades, proficiency sits in the upper half of typical elementary outcomes, with third grade and fifth grade performing roughly in line with one another and fourth grade slightly lower. Math proficiency is noticeably weaker. Third grade hovers around the midpoint; fourth grade dips slightly below it; fifth grade falls further, with roughly two in five students meeting state standards. Science proficiency in fifth grade (the only grade tested) sits just above the midpoint. The 2024-25 school year brought a change in state testing cut scores, so year-to-year trend data is not yet comparable; a parent looking for growth patterns should check with the school about prior-year outcomes once those become comparable.
Among districts in Kendall County, Southbury's overall proficiency index places it above the midpoint, meaning the school is performing better than most of its county neighbors on average. This positioning masks the subject-level softness in math, particularly in the upper elementary grades, where the gap widens. A parent might ask the school what instructional supports or interventions are in place for math, especially as students approach transition to middle school.
The school serves a community undergoing substantial demographic change. Oswego has been one of the fastest-growing areas in the country in recent decades, with new residential subdivisions actively under construction. Housing values and rents in the area have risen modestly year-over-year; families should expect the neighborhood to continue shifting as new developments come online. The Oswego School District's economy is anchored by the school system itself (the region's largest employer), retail corridors along Route 34, and health care. Downtown Oswego has a pedestrian-friendly historic core, but most residential and commercial activity spreads across suburban corridors, requiring a car for daily life.
The district itself has made deliberate pedagogical changes. In 2022 it adopted new K-5 social studies and junior high math curricula centered on project-based and problem-based learning, with bilingual English and Spanish resources available. This shift shapes how classrooms at Southbury operate day-to-day.
A major consideration for prospective homebuying families is a bond referendum likely heading to the ballot in November 2026. The district is proposing a significant facilities investment to address HVAC, roofing, and flooring repairs at schools built during the early-2000s growth wave. Because the district is retiring existing long-term debt at the same time, property-tax effects may be modest or even reduce overall debt-service burden for some homeowners, but the timing and exact terms of the referendum will matter for family finances. A parent or prospective resident should monitor district communications and the November election closely, as this decision will affect the school's physical plant and the property-tax environment for years to come.
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