Brennan High School

Brennan High School

Northside ISD

San Antonio, Texas

3,142 students

High School, Grades 9–12

(210)398-1250 School Website

3,142

Students

17.9:1

S:T Ratio

School Snapshot

Key metrics at a glance

Avg SAT Score

1,080

out of 1600

Average

Avg ACT Score

B+

out of 36

Good

AP Courses

A+

courses offered

Excellent

AP Enrollment

34%

C+

of students

Good

Student-Teacher Ratio

18:1

students per teacher

Average

Graduation Rate

99%

A+

Excellent

Reading Proficiency

65%

B+

Good

Math Proficiency

31%

C+

Below Avg

This Week at Brennan – August 17, 2026

412 students practicing on Varsity Tutors

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Academic Grades

Select a grade level to explore courses and resources

Academic Pathways

Explore 1 courses in the 2025-26 catalog for Brennan High School

English I

Activities building on prior knowledge to strengthen reading, writing, and oral language skills with daily practice.

Standardized Test Dates

Upcoming national, state, and school calendar dates that affect students at Brennan High School.

National Tests

August 1, 2026 – November 30, 2026

ISEE — Fall Testing Season

Testing window

August 3, 2026 – June 30, 2027

SSAT — Flex Testing

Testing window

August 22, 2026

SAT — National

Test date

August 28, 2026

SAT — National

Registration deadline

September 1, 2026

ACT — National

Late registration deadline

September 1, 2026

SAT — National

Late registration deadline

+76 more national tests this school year

State Assessments

November 30, 2026 – December 11, 2026

STAAR — Fall EOC

Testing window

February 15, 2027 – March 26, 2027

TELPAS

Testing window

February 15, 2027 – March 26, 2027

TELPAS Alternate

Testing window

March 15, 2027 – April 16, 2027

STAAR — Alternate 2

Testing window

March 15, 2027 – April 16, 2027

STAAR Alternate 2

Testing window

April 5, 2027 – April 16, 2027

STAAR — Reading Language Arts and English EOC

Testing window

+4 more state assessments this school year

See the full national test & school calendar

After Brennan High

Where graduates go and what they study

Popular Colleges

The University of Texas at San Antonio

University of Texas - Austin

Texas A&M University

Texas State University

Northwest Vista College

University of the Incarnate Word

Baylor University

Texas A&M University - Corpus Christi

Popular Majors

Biology

Business

Nursing

Psychology

Pre-Medicine Studies

Computer Science

Kinesiology and Exercise Science

Forensic Science and Technology

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SAT Prep

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ACT Prep

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1:1 Tutoring

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Live Classes

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Practice Hub

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Principal

John Trimble

School Details

Address

2400 Cottonwood Way, San Antonio, TX 78253

Phone

(210)398-1250

Website

Visit Website

District

Northside ISD

Teachers & Staff

Academic Calendar

2026-27

Important dates, holidays, and school events

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Other Schools in District

Nisd Bexar County Jja

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