KIS is a well-established member of TISAC (Thailand International Schools Activities Conference) and, along with 13 other international schools, participates in the range of activities provided by the organization. The purpose of TISAC is to provide a well-rounded program of both sports and cultural activities for participating schools, that will achieve recognized educational objectives and provide an enjoyable activities programme for all participants. Participation at TISAC events is open to students from Kindergarten and up (5 years +).

Primary School students are given the opportunity to strengthen their skills and to try out for different TISAC sports teams. Students can practice their skills during the after school programs, during the Friday clubs and at lunch time. Secondary School students train and build skill tactics for TISAC competition in the Sports Coaching Clubs.

Participation in KIS sports classes as well as commitment to practice are the stepping stones to selection for the KIS TISAC teams. League members are required to conduct all competition in a spirit of good sportsmanship.