ABSTRACT Jumatin Surya Ningsih, 2020, entitled The Effectiveness of Brainstorming Technique on Young Learners’ Vocabulary Mastery at Level B of TK Al-Ma’arif Sampang. Ungreduated, Thesis. Tarbiyah Faculty, English Teaching Program (TBI), The State Islamic Institute of Madura (IAIN) Madura. Advisor: Afifah Raihany, M.Pd. Key Words: Effectivenees, Brainstorming Technique, Young Learner,…