CIS Mission Statement:
CIS aims to provide primary and secondary education to children of foreign nationals, non-resident Indians and Indian nationals. Education is to be provided in a welcoming, respectful and multi-cultural environment. Learning is student centered. CIS aims to provide a broad and well-rounded international curriculum aiming at the full development of the child: academically, physically as well as emotionally.

Philosophy:
CIS is an institution that prepares students for the GCE Examinations of the London Qualifications and Cambridge International Examination (UK) at the Ordinary and Advanced Levels, adheres strictly to the curricula prescribed. The school has approximately 650 students from various countries and cultures.

The methods of teaching are in keeping with International demands and concentrate in promoting the skills of comprehension, analysis, inference, interpretation, correlation, logic and good writing, Equal emphasis is placed on Science, Mathematics, the Social Sciences and the Liberal Arts. Our school is unique in the sense that the teaching staff inculcates in the students a genuine love of learning and pride in achievement and enables them to develop social skills which help them negotiate life with all it's difficulties. Intellectual pursuit (academic as well as cultural) is the primary focus of our philosophy.

The greatest traits of our students are individuality, global outlook, self-reliance, commitment to self and to society, independence of viewpoint and environmental consciousness.

Calcutta International School was established in 1953 by Miss Barth and has been known by its current name since 1971. It started as a small institution exclusively for the children of the then numerous expatriate British community. The school earned a high reputation as an institution providing quality academic and extra-mural education under Miss Barth whom won an OBE for her services.

History:
In 1970, the Calcutta International School society (CISS) was formed under the West Bengal Society's Regulation Act, 1961. Today, the school is a larger institution for the sons and daughters of expatriates, foreign passport holders, former Non-resident Indians, and the local community (in that order) but maintains it's exclusive character and reputation among other similar institutions.

CIS offer 'O' level and 'A' level curricula for the graduating classes and follows the UK National Strategy for the entire school curricula. It is a British Council affiliated center for London Examination from Edexcel International Centre No. 93058 and for Cambridge International Examinations (Centre No: IN218).

CIS offers three academic streams: Humanities, Sciences and Business Studies. The school's pedagogical philosophy is to impart quality education within the non-coercive regime of discipline, from kindergarten right up to 'A' levels. Accordingly, student numbers per class are limited to an average of 26. The school's academic record at both 'O' and 'A' level compares favourably with the best in the world.

All the conventional school level subjects are taught, besides languages, art and computer science in the upper school. It has fully equipped laboratories for Physics, Chemistry and Biology. All classrooms are bright, well ventilated and air-conditioned during the hot summer months. Extra-mural activities include sports, elocution, music, debating, drama, dance, extempore speech training, public speaking, personality development, taekwondo, scouts and guides etc. CIS also has arrangements with some of the city's top clubs for training sessions in tennis and swimming.