KOMSYUN TITIS MUKTI UTAMI. 2010. Thesis "The Use of Jigsaw Technique to Increase The Students' Vocabulary Mastery (An Action Research in The Fourth Grade of SDN 01 Bantarbolang Pemalang in Academic Year 2009/2010)" Strata 1 Program of Teacher Training and Education Faculty Pancasakti University Tegal Key Words : Jigsaw Technique, Vocabulary Mastery The writer finds in the classroom action re…