St. Thomas' School (New Delhi)

The school is divided into two, the junior school and senior school, the junior school is located in Karol Bagh and the senior school is located in Mandir Marg. The junior school has classes till Grade IV and the senior school has classes from Grades V to XII. Each school has a library managed by a librarian and other staff. The senior school library has 18000 books, 40 periodicals and magazines, and 6 daily newspapers. The senior school has an auditorium, the Helen Jerwood Auditorium named after the founder of the school. Both buildings have a sports playground and a massive garden for students.

The senior school has three science labs, two computer rooms, a music and dance room, a geography lab, a home science lab, an art room and a theater room. The junior school has a science lab, and a music and dance room. Both the schools have open stages for theater.

The school magazine - The Jyoti Magazine - covers events organized by the schools and also features students' articles, poems, and jokes. It is published in English, Hindi, Sanskrit, and French.

The school E-newsletter - Impact- is made by the students and edited by the editorial board of the school.

The school elects a cabinet every year. The cabinet has a Prime Minister as the head. A ceremony is held each year announcing the cabinet election results. The school encourages leadership skills and also introduces students to the democratic system of government. The school's current (2019-20) prime minister is Devarshi Garghashya The two deputies of the Prime Minister are Ojasvi Chadhok and Diti Grover . Also, the school has 4 houses, Chand Bibi, Madam Curie, Nightingale and Sarojini Naidu, whose captains are also elected by the students belonging to their respective houses. Each house has a captain and two vice captains. Currently, Rhea Jain is the captain of Chand Bibi house along with her two vice captains Sharvi Sharma and Vrinda Dudeja. Gaurika sharma and arja arora are the vice captains of Sarojini Naidu house with Ashveen Saluja as the Captain. Visheshta Sawhney and Diya Kharbanda are the vice captains of Madam Curie house with Mansi Chaudhary as their captain. The captain of Nightingale house is Arshia Saluja with two vice-captains Harjasleen Kaur Gill and Baani Sabharwal.

The summer uniform is a white salwaar, a light green kurti, white nylon socks, and black adidas shoes. The winter uniform is a full sleeves white blouse with a dark green and brown check skirt, a brownish mustard blazer with the school emblem, a full sleeves sweater of the same color as the blazer and green woolen socks. There is a green muffler in addition to the uniform.

The school is divided into four houses honouring four women icons:

•   Chand Bibi - Section A
•   Madam Curie - Section B
•   Nightingale - Section C
•   Sarojini Naidu - Section D