Sepni Tri Manu Pengarang NOVRIANI RABEKA MANAFE Dosen Pembimbing 2 Soleman Dapa Taka Dosen Pembimbing 1 Yanpitherzon Liunokas Ketua Penguji Novriani Rabeka Manafe Penguji 2 Soleman Dapa Taka Penguji 1

This study is entitled: "Improving Vocabulary of Seventh-Graders of SMP Negeri 8 Kupang in the Academic Year 2023/2024 By Using Spinning Wheel Game” This study aims to determine the effectiveness of Spinning Wheel game on students' vocabulary knowledge and to see student development before and after learning to use Spinning Wheel games. This research lasted for two weeks at SMP Negeri 8 Kupang. The researcher chose class 7/ C students as the subjects of this research. This research is an experimental design with a quantitative approach. There were 330 students in grade 7, and the researcher took 30 students of 7th grade as a sample (10%) which is distributed into two groups such as Control group consist 15 students and Experimental group consist 15 students. The instrument used to collect data to measure the value of variables was a test that was multiple choice that consist of 15 items. In collecting the data, the researcher used pre-test, treatment and post-test as the data collection procedures the followed by analyzing the data by using t-test formula.