Attorney Federico Semilla, the founder of the institution, was a native of Marinduque who migrated with his family to Quinabigan, one of the barangays of the town.
EMITS runs a student theatre, through the theatrical organization Tanghalan Ngani.
It has produced plays including Evita: La Santa Peronista (September 2007), Joseph (February 2008), and EMITS High School Musical Plus (August 2008).
There are also school newspapers The Rainbow Times (in English), and Pulso ng EMITS (in Filipino).
In the national press conference in Koronadal City, Pulso ng EMITS won second place in the Best Feature Page category.