International School of America

San Antonio, Texas

485 students

High School, Grades 9–12

#44

Best ACT in Texas High Schools

485

Students

10.8:1

S:T Ratio

School Snapshot
Key metrics at a glance
Avg SAT Score

1,013

B

out of 1600
Average
Avg ACT Score

28

A

out of 36
Excellent
AP Courses

7

B

courses offered
Average
AP Enrollment

94%

A+

of students
Excellent
Student-Teacher Ratio

11:1

A

students per teacher
Excellent
Academic Grades

Select a grade level to explore courses and resources

Standardized Test Dates

Upcoming national, state, and school calendar dates that affect students at International School of America.

National Tests

April 21, 2026 – May 29, 2026

ACT — School Day - Late Spring Online

Score release

May 14, 2026 – May 28, 2026

SAT — School Day

Score release

May 16, 2026 – May 30, 2026

SAT Score Release Date

Score release

May 26, 2026

SAT *Late Registration/Changes/Cancellations Deadline

Late registration deadline

May 29, 2026

ACT

Late registration deadline

June 5, 2026

ACT

Registration deadline
+40 more national tests this school year

School Milestones

May 21, 2026 – May 29, 2026

School End/Summer Start

Other

May 22, 2026 – June 4, 2026

School End/Summer Start

Other
TX

May 23, 2026 – June 7, 2026

Graduation

Other
TX

May 28, 2026

School End/Summer Start

Other

June 4, 2026

School End/Summer Start

Other
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School Details
Academic Calendar
2025-2026

Important dates, holidays, and school events

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