ABSTRACT Millah, Faiqotul 2015 : THE EFFECTIVENESS OF SEMANTIC MAPPING IN IMPROVING VOCABULARY MASTERY FOR THE SEVENTH GRADE STUDENTS OF MTS ISLAMIYAH SENORI IN THE ACADEMIC YEAR OF 2014/2015 Advisor : Prof. Dr. Agus Wardhono, M. Pd. Key Words : Effectiveness, Semantic Mapping, vocabulary, and MTs Islamiyah Senori. In teaching and learning process, the teacher wants to have active and enth…