Summary:
Slidell, Louisiana, is home to three public high schools—Slidell High School, Northshore High School, and Salmen High School—all part of the St. Tammany Parish school district, which serves grades 9 through 12 and is ranked among the top districts in Louisiana.
Northshore High School stands out as the top performer in Slidell, consistently earning a 4-star rating and ranking 40th in the state (88th percentile) for the 2025-2026 school year. It boasts the highest graduation rate (85.7%), the lowest dropout rate (3.1%), and the lowest chronic absenteeism rate (19.7%) among the three schools. Its test scores are exceptional, with 82% proficiency in Algebra I, Geometry, and English II—well above district and state averages. In contrast, Salmen High School faces significant challenges, with a 1-star rating, a state rank of 231st (29th percentile), and the highest percentage of students receiving free or reduced lunch (62.6%). Its test scores are consistently the lowest, such as only 29% proficiency in Geometry. Slidell High School sits in the middle, with a 3-star rating and a state rank of 147th (55th percentile), but its graduation rate of 72.6% is a concern, as it is the lowest in the city and well below the district average of 82.6%.
Key takeaways include a clear stratification of performance: Northshore excels, Slidell High is average, and Salmen struggles. Chronic absenteeism is a major issue at Slidell High (32.4%) and Salmen High (30.0%), both far exceeding the district average of 21.2%. Northshore’s consistent excellence over three years demonstrates a stable and effective educational environment, making it a strong asset for families in Slidell.
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