St. Mary's Convent Sr. Sec. School, Dewas, M.P., founded in July 1968 is run by the FSMA Sisters, a religious institute which has several flourishing schools in the country. It is Co-ed school. Its aim is to give an all around development to the students and to educate them to be responsible individuals and worthy citizens of moral calibre and noble character by discovering their talents and developing their faculties of mind and body. The medium of instructions is English. The motto of the school is "LET YOUR LIGHT SHINE". This motto invites the students to spread effectively all around them the inspirations, knowledge and excellence of character and personality acquired in the school.