Summary:
Zip code 20902 in Silver Spring, Maryland, is home to two public middle schools serving grades 6-8 within the highly-rated Montgomery County Public Schools district.
Sligo Middle is the standout school in this area, significantly outperforming Odessa Shannon Middle across nearly every academic metric. Sligo Middle ranks in the 61st percentile statewide (3 stars), while Odessa Shannon Middle ranks in the 21st percentile (1 star). The academic gap is most pronounced in Mathematics, where Sligo's proficiency rate (25.4%) is more than double Odessa Shannon's (9.9%), and in 8th-grade Science, where Sligo's rate (41.7%) is nearly four times higher than Odessa Shannon's (11.6%). Both schools have nearly identical student-teacher ratios (12.6:1 and 12.7:1) and similar per-student spending, with Odessa Shannon actually spending about $1,500 more per student. This suggests that factors like school culture and instructional strategies are driving the performance differences, not just funding or class size.
A critical indicator of the performance gap is chronic absenteeism: Odessa Shannon's rate (24.1%) is exactly double that of Sligo Middle (12.0%). While Odessa Shannon serves a higher percentage of students from low-income households (55.61% vs. 46.72%), Sligo Middle demonstrates that high poverty does not preclude academic success, achieving proficiency rates at or above state averages in ELA and Science. Sligo Middle also excels in advanced math, with Algebra I and Geometry proficiency rates far exceeding district and state averages, while Odessa Shannon lags in these areas. For parents, Sligo Middle offers a stronger academic environment, while Odessa Shannon faces significant challenges that require targeted intervention, particularly in reducing chronic absenteeism and improving science and math instruction.
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