A school with the right environment goes a long way in shaping the life of a student. Tremendous effort and sacrifice is involved in establishing and maintaining a high quality institution. In the days when Janakpuri was taking shape, very few facilities were available. Farsighted Mr. T. P. Aggarwal visualized the need of an Educational Institution in this area, an institution which made its humble beginning more than 3 decades ago which today stands high with the reputation and glorious record for high quality education and with a student strength of about 3000 and a faculty strength of 150. Toil, goodwill & struggle of many people have gone into its making. The school is affiliated to the CBSE Board and runs classes from I to XII. Children are offered all three streams - Humanities, Science & Commerce and are showing excellent results every year.

The school provides holistic learning wherein both scholastic & non-scholastic aspects are included. Children learn in variety of ways through experience, making & doing things, experimentation, reading, discussions, asking, listening, thinking, reflecting, and expressing oneself.

In the year 1990, another St. Marks. School was established in Meera Bagh, which was inaugurated by the then Lt. Governor of Delhi Air Chief Marshal Arjan Singh. It has a strength of over 3,500 students & is doing very well in all spheres.

In addition to this, a school exclusively for girls was inaugurated by the hon’ble Chief Minister of NCT of Delhi, Ms. Sheila Dikshit on Jan. 19, 2000. Under the canopy of the school motto ‘Loyalty, Truth and Honour’ the staff and the management of St. Mark’s School endeavor not only to enable students to compete but eventually shaping them into wonderful human beings imbibing rich cultural heritage and to keep alive our traditions & a sense of responsibility towards the nation.