ABSTRACT Lisajida, Ahya. 2024. "The Effectiveness of Baamboozle in Teaching Grammar Mastery to the Seventh Graders of SMPN 2 Mungkid in Academic Year 2023/2024". English Study Program, Faculty of Education and Teacher Training, Universitas Tidar. Advisor I Carolus Prima Ferri K., M.Pd., Sukma Shinta Yunianti, M.Pd. Keywords: teaching media, Baamboozle, grammar mastery Grammar is an essentia…