Summary:
Zip code 19966 is home to just one middle school, Millsboro Middle School, which serves grades 6 through 8 and is part of the highly-rated Indian River School District (4 stars, 71st percentile statewide). With 726 students and a favorable 13.6:1 student-to-teacher ratio, this is a large school that consistently ranks in the bottom half of Delaware middle schools, fluctuating between the 34th and 46th percentile over the past three years and earning a 2 or 3-star rating.
Academically, Millsboro Middle School lags behind both district and state averages in English Language Arts and Math across all grade levels, with the widest gaps appearing in 6th grade (30.7% ELA proficiency vs. 43.25% district and 38.49% state; 25.33% math proficiency vs. 36.91% district). The school's most glaring weakness is 8th-grade Science, where only 11.24% of students are proficient—a staggering 8.35 points below the district average and 5.38 points below the state. However, there is a notable bright spot in 7th grade: Social Studies proficiency reaches 59.92%, which beats the state average of 55.06%, and 7th-grade math scores (30.42%) nearly match the state average (30.67%). This "7th grade anomaly" suggests a particularly effective teaching cohort or a unique strength in that grade level.
A critical concern is the school's chronic absenteeism rate of 22.0%, which is higher than both the district (20.2%) and state (17.1%) averages—a factor likely contributing to the below-average test scores. The school's state ranking has also been inconsistent, improving from 35th to 29th before dropping back to 33rd, indicating a lack of sustained momentum. While the Indian River School District performs well overall, Millsboro Middle School is a clear underperformer within it, pointing to school-specific challenges rather than district-wide issues. For parents, the key takeaways are that this school offers a solid student-to-teacher ratio but struggles with science instruction and attendance, both of which represent the most promising areas for targeted improvement.
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