Lumbanraja, B. R.; Layola Naibaho; Vivi Rinanda; Ummi Kalsum Siahaan; Dumaris Silalahi. THE EFFECT OF WORD SEARCH PUZZLE IN STUDENTS’VOCABULARY MASTERY AT SEVENTH GRADE IN UPTD SMP NEGERI 4 PEMATANGSIANTAR. didaktik 2025, 11, 15 - 31.