St. Thomas International School school is a premium Co-Ed English Medium School, Affiliation to Central Board of Secondary Education (CBSE) New Delhi. It has been established by Mukti Mission which is an autonomous, charitable, non-profit , education institution established since 2002. St. Thomas International School is a pioneer in the field of educational measurement,aptitude testing and psychological & educational research.

St. Thomas International School aims to provide a nurturing, learning environment to enable students to become responsible citizens, life-long learners, and good communicators through a challenging curriculum. The well researched, project based National learning methodology of the school is designed to prepare students to excel in the world's finest colleges and universities.The St. Thomas International School aims to provide a learning environment where students are challenged to reach their individual potential by the acquisition of knowledge and the development of personal, cultural and democratic values essential for future success.

St. Thomas International School believes that classroom learning is not sufficient to make a child excel in life; therefore it aims to provide students with learning beyond academics, by developing talents through an emphasis extra curricular activities and life skills. The Teachers are the heart of the academic program and St. Thomas International School is committed to have motivated and trained teachers. The school also aims to emphasize the importance of collaboration between parents and the school so that all parents are actively involved in their children's education.

St. Thomas International School is located at the world fame international place of Sarnath (where lord BUDDHA given first cermon to HIS pupils) Our school has spacious well ventilated classrooms which are of international standards. There are also spacial activity rooms for enrichment activities both educational and recreation like a media room ,smart classes ,music room,dance and performing arts room , art and craft room etc. The School is also equipped with one of the largest and most well stocked libraries in the city , a state of the largest and most well stocked libraries in the city , a state of the art computer lab with broadband internet access on all computers and wi-fi enable campus.