ABSTRACT ROKHMAT, BASUKI 2011. " The Effort to Improve The Students' Vocabulary Mastery by Using Flashcard (An Action Research of The Fourth Year Students of SDN Bongkok 02 in Academic Year 2010/2011)". Thesis. English Department of Teacher Training and Education Faculty Pancasakti University Tegal. Advisor, Dra. Hj. Sri Wardhani, M.Pd (1) Drs. Masfuad ES, M.Pd (2) Key word: Students' …