Vocabulary knowledge is often viewed as a critical tool for second language learners because a limited vocabulary in a second language impedes successful communication. Therefore, it is important to do a research entitled “Improving Students’ Vocabulary Mastery Through Student Team Achievement Division (STAD) of Eighth Grade at SMPN 4 Tanggul”.
In this research, the problem is “How can the implementation of STAD improve students’ vocabulary mastery of eighth grade at SMPN 4 Tanggul?.
How can the implementation of STAD improve students’ active participation of eighth grade at SMPN 4 Tanggul?.” And the objective of this research is “The objective of this research is to know how the use Student Team Achievement Division (STAD) can improve students’ vocabulary mastery of eighth grade at SMPN 4 Tanggul.The objective of this research is to know how can Student Team Achievement Division (STAD) improve students’ active participation vocabulary mastery of eighth grade at SMPN 4 Tanggul”.
The design of this research is classroom action research. The research subject is VIII E class consisting of 30 students’. The data are collected using test method, the instrument used is test items. In order to analyze the data students’ vocabulary score, percentage formula is used.
The implementation of Student Team Achievement Division with combined with small groups and made the Student Team Achievement Division as a competitive game in the cycle. All of the students’ were active in the teaching and learning activities, and they didn’t feel bored again because they can compete with each other. Those caused the result of cycle two achieved the criteria of success. Student Team Achievement Division improve students’ vocabulary mastery in two cycle from the percentage of students’ scored ≥ 65 (E = 70%) in Cycle 1 to (E = 71%) in Cycle 2.
Based on the research result, It can be concluded that Student Team Achievement Division is able to improve the students’ vocabulary mastery at SMPN 4 Tanggul in the 2018 / 2019 academic year.