Best High Schools in Zip Code 78239

Zip code 78239 in San Antonio, Texas, is home to two high schools serving grades 6-12 and 9-12, offering starkly different educational experiences for families in this area.

Idea Walzem College Preparatory is the standout school in the area, part of the Idea Public Schools network. This larger charter school (724 students) shows strong academic performance, consistently outperforming its local competitor across nearly all subjects. In the most recent school year, it achieved proficiency rates of 78.42% in Biology and 59.78% in English I Reading, both exceeding state averages. The school is on an upward trajectory, improving its state ranking from the 62nd percentile to the 50th percentile over three years, and maintains a stable graduation rate of 82.6% with a low dropout rate of 2.4%. In contrast, Premier High School-San Antonio Windcrest, part of the Premier High Schools district, is a much smaller school (78 students) focused on credit recovery for at-risk students. It faces significant challenges, with proficiency rates drastically below state averages—only 11.11% in Algebra I and 16.67% in English I Reading. Its 34.0% graduation rate and 16.5% dropout rate indicate a crisis-level situation, and the school ranks in the bottom 14th percentile statewide.

Both schools serve high-poverty populations (over 74% free/reduced lunch), yet their outcomes are dramatically different, highlighting how educational models and resources matter. Idea Walzem College Preparatory benefits from a lower student-to-teacher ratio (16.8:1) and higher spending per student ($10,975), while Premier High School-San Antonio Windcrest has a ratio of 26:1 and spends $9,439 per student. An interesting exception is Premier's English II Reading performance, which approached state averages in 2024-2025, suggesting a possible strength in that specific area. Overall, families in zip code 78239 have a clear choice between a rising college-preparatory school and an alternative school facing severe academic and operational struggles.