Basis San Antonio Pri- Medical Center Campus

Basis San Antonio Pri- Medical Center Campus is a high-performing elementary charter school in San Antonio's Medical Center area, serving 799 students in grades K-5 as part of the Basis Texas district, which ranks in the 98th percentile statewide.

This school stands out dramatically from nearby schools in the Northside Independent School District (Isd). While Basis San Antonio ranks in the 96th percentile statewide, the closest Northside ISD school, Leon Valley Elementary, ranks in the 52nd percentile, and most nearby schools fall in the bottom 20%. The achievement gap is enormous: in 5th Grade Reading, Basis achieved 86.61% proficiency, compared to just 30.77% at McDermott Elementary. Even the other charter school in the area, Somerset Academy Oaks, which performs well above Northside ISD schools, still trails Basis in 3rd Grade Reading (75% vs. 79.2%). Notably, Basis achieves these results with a higher student-teacher ratio (19.7:1) and lower spending per student ($7,350) compared to surrounding schools, which spend between $9,898 and $11,809 per student.

While the school's overall performance is elite, there are a few nuances. Its state ranking has slipped slightly from 83rd (98th percentile) in 2022-2023 to 162nd (96th percentile) in 2025-2026. Additionally, 5th Grade Science scores, while still far above the state average at 58.02% proficiency, lag behind the school's Reading (90.08%) and Math (85.5%) scores. The school serves most student subgroups exceptionally well, with at-risk students historically ranking in the 99th percentile. However, Asian students rank in only the 62nd percentile, making them the lowest-performing subgroup—an interesting outlier worth investigating. Overall, Basis San Antonio represents a high-efficiency, high-expectation educational model that produces dramatically different outcomes than the traditional public schools serving the same community.