IMPHAL, July 4: In the wake of the announcement of the private school welfare association to include Thang-Ta course as co-curricular syllabus, the Kanglei Indigenous Martial Arts and Cultural Society (KIMACS) has asked three instructors each from various Thangta institute to join a 10 days refresher course to be started from July 6, 2011 at the KIMACS office, informed a statement of the KIMACS.