<![CDATA[This study aims to improve students’ vocabulary acquisition through the use of YouTube educational videos and to identify changes in students’ involvement during the English vocabulary learning process. This research was motivated by students’ difficulties in recognizing, understanding, and memorizing vocabulary due to limited exposure to authentic language and the lack of engaging learning media. The method used was Classroom Action Research (CAR) based on the Kemmis and McTaggart model, consisting of planning, action, observation, and reflection stages conducted in two cycles. The participants were 30 students of grade VIII C at one of the public junior high schools in Surakarta, Central Java. Data were collected through vocabulary tests, classroom observations, and questionnaires. The results showed an improvement in the average score from 62 in the pre-test to 71 in Cycle I and 83 in Cycle II. In addition, students’ involvement in the learning process also increased. Therefore, YouTube educational videos can be used as an effective supporting medium for teaching English vocabulary.]]>
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