San Isidro Independent School District (Isd)

The San Isidro Independent School District (Isd) is a very small, rural district in Texas with just two schools: San Isidro Elementary (serving grades PK-8) and San Isidro High School (serving grades 9-12). The district serves about 153 students total, and nearly all students come from economically disadvantaged backgrounds. While the district ranks in the 35th percentile statewide, the two schools tell very different stories.

San Isidro High School is a clear standout, showing strong academic performance and perfect student outcomes. It boasts a 100% graduation rate and a 0% dropout rate, and it excels in English, with 100% of students proficient in English II Reading—far above the state average. The high school’s state ranking has improved significantly, reaching the 83rd percentile in 2024-2025. In contrast, San Isidro Elementary faces major challenges, especially in math, where proficiency rates have been as low as 0% in some grades. However, the elementary school shows bright spots in reading, such as 100% of 7th graders and 70% of 5th graders meeting proficiency in 2025-2026, exceeding state averages.

Key metrics reveal a paradox: despite a very low student-teacher ratio (about 8.6:1) and high per-student spending (around $17,000), the elementary school’s math scores remain critically low, suggesting resources aren’t translating into academic success. The high school, however, demonstrates that students who persist are well-supported, achieving strong results in English, Biology, and U.S. History. Performance at the elementary level is volatile due to small class sizes, where one student’s score can swing percentages dramatically. Overall, the district offers a tale of two schools: a struggling elementary with potential in reading, and a high school that is a true success story.