Summary
Centennial High in Ellicott City, MD, is a top-performing high school serving 1,377 students in grades 9-12 within the highly-regarded Howard County Public Schools district, which is ranked 4th in Maryland. The school has a long history of academic excellence, earning a 5-star rating from SchoolDigger for most of the past decade and currently ranking 25th out of 227 high schools in the state, placing it firmly in the top tier.
Centennial's standout strength is its exceptional English Language Arts (ELA) proficiency, with 84.2% of all students proficient, significantly outpacing the district average of 65.9% and the state average of 51.7%. This performance surpasses nearby schools like Howard High and Mount Hebron High. However, the school has a unique "inverse" math profile: Algebra I proficiency is notably low at 10.2%, while Algebra II proficiency is exceptionally high at 43.2%, the second-highest among peers after River Hill High. This pattern, consistent over four years, suggests that many students take Algebra I later, making the test-taker group broader, while Algebra II students are more self-selected for advanced math. This contrasts sharply with schools like Hammond High and Atholton High, where Algebra I proficiency is higher than Algebra II.
Centennial's graduation rate of 93.1% is solid and above the district average of 91.3%, though slightly below Mount Hebron and Howard High. Chronic absenteeism has risen to 18.0%, a concern compared to River Hill's lower rate of 13.6%. The school also demonstrates efficient resource use, spending about $17,982 per student, which is lower than schools with lower academic performance like Wilde Lake High ($21,629) and Oakland Mills High ($20,779). Overall, Centennial offers a strong academic environment with notable strengths in ELA and advanced math, though families should be aware of the unique math placement patterns and the need to monitor attendance trends.
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