IMPROVING STUDENTS’ VOCABULARY MASTERY BY USING SCRABBLE AT THE SIXTH GRADE STUDENTS AT SD NEGERI 007 BANGUN PURBA - Prayitno, Puji; English Study Program, Faculty of Teacher Training and Education, University of Pasir Pengaraian (Jurnal Ilmiah Mahasiswa FKIP Prodi Bahasa Inggris, 2015)