Summary:
In zip code 78240, there is one high school, Marshall High School, a large school serving grades 9 through 12 with 2,634 students in San Antonio, Texas, as part of the Northside Independent School District (ISD).
Marshall High School shows a mixed performance profile. On the positive side, it boasts a strong graduation rate of 94.5% and a very low dropout rate of just 0.5%, both better than the district averages. The school has also shown year-over-year improvement in several core subjects, including Algebra I, English I and II Reading, and U.S. History. However, academic proficiency in most tested subjects falls below state and district averages. The most significant challenge is in Algebra I, where only 28.97% of students are proficient—a gap of nearly 25 percentage points below both the district and state. In contrast, the school outperforms the state average in U.S. History (72.95% vs. 70.17%), indicating a strength in social studies. The school has a student-teacher ratio of 15.3:1 and spends $8,637 per student.
For parents, the key takeaway is that Marshall High School is effective at keeping students on track to graduate, but there are clear academic challenges, particularly in mathematics. The school's state ranking has fluctuated, recently sitting at the 42nd percentile (2 stars) for the 2025-2026 school year, after being in the 51st percentile (3 stars) in 2023-2024. The improving test scores in recent years suggest that instructional changes may be starting to take effect, but the Algebra I scores remain a critical area needing attention. With a high percentage of students (65.38%) eligible for free or reduced lunch, the school serves a predominantly low-income community, which provides important context for its performance metrics.
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