Students of St. Mary's, who have cleared AISSE (X Class) are eligible for continuing their studies here in XI Classes. However, they have to complete the procedure involved in the selection. These students seeking seats in XI need to register their names on the dates prescribed by the School and forward an application to the Principal in the prescribed format showing their group (subjects) of choice and must get associated formalities completed. The allotment of group and selection will be done purely on the basis of merit (Marks secured in the AISSE) and any student can be denied a seat if the Principal feels his/her conduct is detrimental to the smooth conduct of the classes.