This study aims to obtain decent controversial issues-based student worksheet or commonly known as LKPD and to understand the effectiveness ratio of student worksheet to improving of student’s social skills class IV in elementary school. The study method used is research and development in accordance with the theory of Borg & Gall. Collecting data utilizes social skill observation sheet. The subject to this research is students of class IV in elementary school. The results of the study show that the first, controversial issues-based student worksheet is appropriate to use. According to results of assessment, comment, and suggestion from the validation sheet which has been filled out by the validator, its category is "very good". The second, controversial issues-based student worksheet is effective to improve students’ social skill which is evidenced by the result of the Wilcoxon test output which obtained a significance value of 0.003 <0.05, and is supported by descriptive output refred that the average value of students’s social skill social skills before 22.41, and after given on controversial issues-based student worksheet is higher, 30.83.