The top reported proficiency rate is 54% in English language arts. The lowest is 27% in Math.
Original Research by School Decision on Northbrook School
Northbrook School is a middle school serving grades five through eight in Mendota, a small north-central Illinois city roughly eighty-five miles west of Chicago. The school sits in a community with a notably large Hispanic population, modest owner-occupied housing, and an aging industrial and agricultural economic base. The broader city is stable in population but facing headwinds from recent plant closures, though the city is actively marketing infill development and business park land.
The school currently enrolls a mix of students across four grade levels, with a student body that is a bit over half white and a substantial portion Hispanic. Enrollment data shows students across all grades present and engaged. The school's parent district, Mendota CCSD 289, recently completed a multi-year facilities modernization funded through working-cash bonds, with Northbrook receiving new HVAC and related building upgrades as part of that work. This investment means students are learning in refreshed, climate-controlled spaces with modern secure entrances and updated classrooms.
State testing results from the most recent year are mixed and merit careful reading. In English language arts, performance is stronger: seventh and eighth graders show proficiency rates well above the midpoint, suggesting solid reading and writing instruction at the upper grades. Fifth graders also achieve at better than moderate levels. Sixth grade ELA sits lower. Math proficiency is consistently a soft spot across the school. Fifth-grade math shows moderate proficiency; sixth, seventh, and eighth grades all fall well below the midpoint, with sixth-grade math being particularly low. Science results are moderate in fifth grade and moderately strong in eighth grade. The pattern suggests that while the school has strengths in literacy, particularly in grades seven and eight, math across the middle grades needs attention. This is a characteristic challenge for many schools nationwide, and a parent may want to discuss with school leadership what instructional changes or support structures are in place to address math proficiency trends.
Chronically absent students and specific student subgroup data, such as students on IEPs or English learners, were not available in the data provided, so a parent interested in those details should ask the school directly. Free-or-reduced-price lunch participation was also not reported; the school can provide that context.
On the broader comparative landscape, Northbrook's overall proficiency index sits below the midpoint when measured against other public school buildings in LaSalle County, a positioning worth noting if you are weighing this school against others in the immediate region. The school's proficiency picture is one of distinct grade-level and subject-area variation rather than uniform weakness across the board.
The school is located at 1804 Guiles Avenue, within Mendota's residential neighborhoods. Housing in the area is relatively affordable: median home values in the zip code are modest, and rental costs are well below state and national benchmarks, making this a financially accessible community for many families. The local housing market shows stable demand with moderate inventory and extended time on market, consistent with a stable, slow-growth small city rather than a hot market.
Northbrook is a straightforward public middle school without charter, magnet, or alternative designation. It is the kind of place most suitable for families seeking a traditional four-year middle grades experience in a small-town setting with modest housing costs and a blend of residential stability and economic challenge. The academic profile suggests a school with real strengths in literacy and some areas requiring closer attention, particularly in mathematics, making the school a reasonable fit for families comfortable with that particular instructional landscape and willing to engage with the school on areas of development.
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