 In 1941, during the alliance with Japan, the name of the school was changed from "The American School for Boys" to Sithammaratwittaya School.The school has grown into a co-educational institution of more than 5,000 students from kindergarten to grade 12.The Srithammarat Suksa School English Programme (EP) was started in 2000 and is one of the largest English programs in southern Thailand with students from pre-kindergarten to grade 12.