KALISURI S.A. INSTITUTION IS ONE OF THE BEST SCHOOLS IN THE DISTRICT OF PATUAKHALI.IT WAS FOUNDED IN 1946 BY THE LOCAL INTERESTED PUBLIC.THE FIRST HEADMASTER OF THE SCHOOL WAS MR ZADU NATH BISWAS B.A.B.T.THE SCHOOL WAS INCLUDED MPO IN 1985. THE SCHOOL WAS NAMED KALISURI SAYADUL AREFIN INSTITUTION IN SHORT KALISURI S.A INSTITUTION AFTER THE NAME OF A GREAT SAINT SAYADUL AREFIN WHO WAS THE DISCIPLE OF HAZRAT SHAH ZALAL.HE CAME TO KALISURI WITH A VIEW TO PREACHING RELIGIOUS ACTIVITIES FOR THE WELFARE OF THE MUSLIMS.AT THAT TIME HE BECAME POPULAR WITH THE LOCAL PEOPLE FOR HIS EXTRA ORDINARY HELPFUL ACTIVITIES.SO THEY NAMED THE SCHOOL KALISURI S.A INSTITUTION AFTER HIS NAME.