ALAMO HEIGHTS H S vs INTERNATIONAL SCHOOL OF AMERICA
ALAMO HEIGHTS H S and INTERNATIONAL SCHOOL OF AMERICA are very closely rated, both scoring around 7.0 out of 10. ALAMO HEIGHTS H S is significantly larger with 1,537 students, about 3.1× the size of INTERNATIONAL SCHOOL OF AMERICA (496). In math proficiency, INTERNATIONAL SCHOOL OF AMERICA leads at 54.5%.
Attendance data is under correction. A public school's existing Resources & Environment score and overall rating shown here may still reflect an unverified attendance input.
ALAMO HEIGHTS H S
San Antonio, TX
1,537 students
INTERNATIONAL SCHOOL OF AMERICA
San Antonio, TX
496 students
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| Metric | ALAMO HEIGHTS H S | INTERNATIONAL SCHOOL OF AMERICA |
|---|---|---|
| Overall Rating | 7.0 / 10 | 7.1 / 10 |
| Academic Score | 7.3 | 7.9 |
| Growth Score | 3.7 | 2.5 |
| Diversity Index | — | — |
| Free/Reduced Lunch | 18.6% | 21.6% |
| Environment Score | 8.6 | 9.2 |
| State Rank | #3,064 of 8,584 | #2,991 of 8,584 |
| State Percentile | 64th | 65th |
Test Scores
| Subject | ALAMO HEIGHTS H S | INTERNATIONAL SCHOOL OF AMERICA |
|---|---|---|
| Math Proficiency | 38.0% | 54.5% |
| Math (State Avg) | — | — |
| ELA Proficiency | 63.0% | 87.0% |
| ELA (State Avg) | — | — |
School Details
| Detail | ALAMO HEIGHTS H S | INTERNATIONAL SCHOOL OF AMERICA |
|---|---|---|
| Type | High School | High School |
| Grades | 9th – 12th | 9th – 12th |
| Enrollment | 1,537 | 496 |
| Student-Teacher Ratio | 12.8:1 | 11.3:1 |
| Free/Reduced Lunch | 18.6% | 21.6% |
| Graduation Rate (4yr, Class of 2023) | 97.0% | 95%+ |
| District | ALAMO HEIGHTS ISD | NORTH EAST ISD |
| City | San Antonio | San Antonio |
Neighborhood
| Metric | San Antonio (78209) | San Antonio (78213) |
|---|---|---|
| Median Household Income | $84,180 | $53,342 |
| Median Home Value | $497,500 | $199,500 |
| Median Rent | $1,371 | $1,161 |
| College Educated (Bachelor's+) | 62.4% | 23.3% |
| Poverty Rate | 8.6% | 18.9% |
| Avg Commute | 19 min | 22 min |
The data story: ALAMO HEIGHTS H S vs INTERNATIONAL SCHOOL OF AMERICA
Alamo Heights H S edges out International School of America by 0.4 points overall — 9.3/10 versus 8.9/10 — a modest but meaningful gap when both schools sit in San Antonio's upper tier. The state rank separation is sharper: Alamo Heights H S lands at #69 of 8,547 Texas schools, while International School of America ranks #301 of the same pool. Both are genuinely elite, but Alamo Heights H S is among the top 1% statewide, while International School of America falls in roughly the top 4%.
Academically, the two schools are identical on paper: both score 9.0/10, meaning neither has a measurable edge in raw proficiency. The real divergence appears in growth. Alamo Heights H S earns a 9.9/10 growth score versus International School of America's 7.6/10 — a 2.3-point gap indicating that students at Alamo Heights H S are outpacing their predicted trajectories at an exceptionally high rate. For families who weight year-over-year academic momentum, that difference is concrete and significant.
Alamo Heights H S enrolls 1,537 students compared to International School of America's 496, so the campuses feel meaningfully different in scale. Despite its larger size, Alamo Heights H S maintains a student-teacher ratio of 12.8:1, only slightly above International School of America's 11.3:1 — a 1.5-student difference that is unlikely to drive class-size decisions on its own. Free and reduced lunch eligibility is nearly even: 19% at Alamo Heights H S versus 22% at International School of America, indicating comparable socioeconomic demographics at both campuses.
Both schools serve grades 9–12, so the instructional span is identical. The distance between the two campuses is just 3.2 miles, meaning proximity alone will rarely break a tie. Families choosing on pure academic output will find Alamo Heights H S holding a stronger overall and growth position; families seeking a smaller school environment will find International School of America's 496-student enrollment and 11.3:1 ratio offer a more intimate setting despite its slightly lower composite score.
Editorial summary generated May 2026 · sonnet
Who each school fits
ALAMO HEIGHTS H S
Alamo Heights H S suits families who prioritize demonstrated student growth and a top-1% Texas ranking. Its 9.9/10 growth score signals that high-achieving students are still being pushed past expectations, and the larger campus of 1,537 students supports broader extracurricular offerings — a good fit for students who want strong academics alongside a full-scale high school experience.
INTERNATIONAL SCHOOL OF AMERICA
International School of America fits families who want a smaller, more closely supervised environment without sacrificing academic quality. At 496 students and an 11.3:1 student-teacher ratio, students get more individual attention. The 9.0/10 academic score matches Alamo Heights H S exactly, making it the right choice for students who perform better in an intimate campus where every face is familiar.