Imam Sudarmaji Penguji 1 Nirna Nirmala Dosen Pembimbing 2 Hudaya Latuconsina Dosen Pembimbing 1 Khusaini Ketua Penguji Irmala Sukendra Penguji 1 Dea Iqlima Pengarang

Dea Iqlima, NIM: 1605020052, “The Effect of Word Square Method to Improve Students’ Vocabulary Mastery at The Third Grade of SDS Penerus Bangsa in Academic Year 2020/2020.” Mini Thesis, English Language Education, Faculty of Teacher Training and Education, Universitas Islam Syekh-Yusuf Tangerang. This research was conducted at SDS Penerus Bangsa. The aim of this research is to find out there whether an Effect of Word Square Method to Improve Students’ Vocabulary Mastery. The population of this research was the third-grade of SDS Penerus Bangsa. The sample are 23 students of III A. This research used Experimental Class. The research data is collected through pre-test and post-test. The result of his research was statistical calculation by One-Sample KolmogorovSmirnov test, it is known asymptotic significances of the pre-test and post-test in experimental class data is 0.000 < 0.05. It can be concluded that Ha is accepted and Ho is rejected. It means there is a significant difference word square method to improve students’ vocabulary mastery. Therefore, it can be concluded that there is positive effect Word Square to Improve Students’ Vocabulary Mastery at the third grade of SDS Penerrus Bangsa in academic year 2020/2021. Keywords: effect, word square method, vocabulary mastery.