The sirimavo Bandaranaike Vidyalaya was inaugurated on January 01/ 1973 as “Stanmore Crescent Primary school” with 5 teachers and 183 students under the guidance of Mrs. Wimala Liyanage , the founder principal.
The first five teachers were, Anula Gunarathne , Sumithra Malagala ,Chandra Samarasinghe ,M.D.P. Peiris and Hema Dambagoda . Symbolise in the children who were similar to flowers the classes named Nelum, Saman , Manel ,Namal and Kumudhu.
From primary school ,the school was developed to a secondary school and finally to a leading national school within the period of 17 years.
At the educational exhibition held eleven months after the commencement of the school which showcased the creativeness of the students, based on a concept of the principal , then Deputy Education Minister B.Y .Tudawe made arrangements to name the school, as “Sirimavo Bandaranaike Vidyalaya”.
As the school developed year by year, during the initial years, the students were sent to Vishaka Vidyalaya Colombo to study in year 6 and after.