Vocabulary mastery is an essential component of English learning; however, many eighth-grade students at SMPN 10 Bengkulu Utara experienced difficulties in remembering word meanings, pronouncing English words accurately, and spelling vocabulary confidently. This study aimed to investigate the effectiveness of the Charades Game in improving students’ vocabulary mastery. The study employed a Classroom Action Research (CAR) design conducted in two cycles involving 23 students of Class VIII D. Data were collected through classroom observations and vocabulary tests. The results showed a significant improvement in students’ vocabulary achievement throughout the research process. The mean score increased from 44.13 in the preliminary stage to 61.30 in Cycle I and further improved to 83.20 in Cycle II. Based on reflections from Cycle I, several improvements were implemented in Cycle II, including providing clearer instructions, demonstrating game procedures more explicitly, and encouraging greater student participation. By the end of Cycle II, most students had achieved the Minimum Mastery Criterion (KKM). Observation findings also indicated positive changes in students’ participation, self-confidence, pronunciation, spelling ability, and vocabulary comprehension. In conclusion, the implementation of the Charades Game effectively enhanced students’ vocabulary mastery and contributed to a more engaging and interactive English learning environment.
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