TAS is a member of the Interscholastic Association of Southeast Asia Schools (IASAS), which includes international schools in Bangkok, Kuala Lumpur, Jakarta, Manila, and Singapore.

Three seasons for IASAS athletics include the following:
  • 1st Season: Cross-Country, Soccer, Volleyball
  • 2nd Season: Basketball, Rugby/Touch, Swimming, Tennis
  • 3rd Season: Badminton, Baseball, Golf, Softball, and Track and Field

Two seasons for IASAS activities include the following:
  • Season One: Model United Nations
  • Season Two: Cultural Convention (2): Art, Music, Drama, Dance, Forensics, Debate