2025 Best ISAS Accredited Private Schools
The 2025 Best ISAS Accredited Private Schools ranking is based on rigorous analysis of key statistics and millions of reviews from students and parents in Texas. Ranking factors include the quality of colleges that students consider, student-teacher ratio, private school ratings, and more. Data sourced from the Texas Education Agency, Texas School Pages users, and the schools directly.
ISAS Accreditation
The Independent Schools Association of the Southwest (ISAS) is a member of the National Association of Independent Schools (NAIS) and accredits independent schools in the southwestern United States.
Number of Schools:60
Average Rating:4.5/5.0
Student-Teacher Ratio:7:1
51-60 of 60 results
#51 BEST ISAS ACCREDITED SCHOOLS IN TEXAS
The Regis School of the Sacred Heart
Houston, TX•Private, Catholic School•Pre-K-8•
134 reviews
Parent: The Regis School of the Sacred Heart maintains high standards through their ISAS accreditation...Read 134 reviews
A+
Overall Texas School Pages Grade
#52 BEST ISAS ACCREDITED SCHOOLS IN TEXAS
The Shlenker School
Houston, TX•Private School•Pre-K-5•
192 reviews
Parent: The Shlenker School maintains high standards through their ISAS accreditation...Read 192 reviews
A
Overall Texas School Pages Grade
#53 BEST ISAS ACCREDITED SCHOOLS IN TEXAS
The Winston School Dallas
Dallas, TX•Private School•Kindergarten-12•
102 reviews
Student: The Winston School Dallas maintains high standards through their ISAS accreditation...Read 102 reviews
A+
Overall Texas School Pages Grade
#54 BEST ISAS ACCREDITED SCHOOLS IN TEXAS
The Winston School San Antonio
San Antonio, TX•Private School•Kindergarten-12•
61 reviews
Parent: The Winston School San Antonio maintains high standards through their ISAS accreditation...Read 61 reviews
A+
Overall Texas School Pages Grade
#55 BEST ISAS ACCREDITED SCHOOLS IN TEXAS
TMI Episcopal
San Antonio, TX•Private School•6-12•
246 reviews
A
Overall Texas School Pages Grade
#56 BEST ISAS ACCREDITED SCHOOLS IN TEXAS
Trinity Episcopal School
Galveston, TX•Private School•Pre-K-8•
247 reviews
Parent: Trinity Episcopal School maintains high standards through their ISAS accreditation...Read 247 reviews
A+
Overall Texas School Pages Grade
#57 BEST ISAS ACCREDITED SCHOOLS IN TEXAS
Trinity Episcopal School Austin
Austin, TX•Private School•Pre-K-8•
58 reviews
Teacher: Trinity Episcopal School Austin maintains high standards through their ISAS accreditation...Read 58 reviews
A-
Overall Texas School Pages Grade
#58 BEST ISAS ACCREDITED SCHOOLS IN TEXAS
Trinity School of Midland
Midland, TX•Private School•Pre-K-12•
227 reviews
Student: Trinity School of Midland maintains high standards through their ISAS accreditation...Read 227 reviews
A+
Overall Texas School Pages Grade
#59 BEST ISAS ACCREDITED SCHOOLS IN TEXAS
Trinity Valley School
Fort Worth, TX•Private School•Kindergarten-12•
229 reviews
Parent: Trinity Valley School maintains high standards through their ISAS accreditation...Read 229 reviews
A
Overall Texas School Pages Grade
#60 BEST ISAS ACCREDITED SCHOOLS IN TEXAS
Ursuline Academy of Dallas
Dallas, TX•Private School•9-12•
167 reviews
Student: Ursuline Academy of Dallas maintains high standards through their ISAS accreditation...Read 167 reviews
A+
Overall Texas School Pages Grade