The study investigated the self Instructional module and teaching competency. The main objective of the study is to assess the teaching competency of prospective teachers before and after implementing teaching competency based self instructional modular package on Giftedness. The investigator developed the self instructional modular package on giftedness and implemented to the prospective teachers (35). The pre and post test score were analyzed based on their mean score. The result evinced that the prospective teachers falling under low moderate category rose to high level of teaching competency and prospective teachers with moderate level got shifted to higher level of teaching competency. Thus, at post test the total sample had achieved higher level of teaching competency to handle children with giftedness. Thus the developed self instructional modular package was found to be effective in developing their teaching competency to handle children with giftedness.