In January 1873, the Reverend William Taylor founded the work of the Thoburn Methodist Episcopal Church in Calcutta (Kolkata).

The latter's ardent preaching soon rendered the Entally Baptist Chapel unable to cope with the increasing number of converts.

[3] Soon even this chapel proved unable to accommodate the growing congregation, until a larger church was constructed on Dharamtolla Street, where it stands today.

[2] Gilbert Samuel, who became Principal in 1997, furthered the cause of co-curricular activities, allowing the students of CBS to secure top positions at premier National and International contests regularly, including a second-place finish at the 2003 Biology Olympiad and the International Informatics Olympiad in 2004.

The school offers courses in Science, Commerce and Humanities[5] (started in 2019) for the students enrolling in ISC.