The purpose of this experiment to develop students\u27 worksheet (LKS). this research is a Student Activity Sheet (LKS) based on material issues cube junior class VIII. This research is development. While the quality of the Student Worksheet (LKS) which will be described include feasibility worksheets, worksheets effectiveness in terms of student learning outcomes, and practicality in terms of student responses LKS Instrument performed in this study (1) sheet material and expert evaluation for both the media experts assessed for (2) about the posttest or learning outcomes for, (3) pieces of student questionnaire responses for practicality LKS. Based on the evaluation results of the evaluation worksheets development of media experts to obtain an average score of 4, so LKS declared eligible. Posttest results showed that the percentage of completeness is 78%, so the subject matter based LKS surface area and volume of a cube can be said to be effective. While LKS developed to obtain an average score of student questionnaire responses by 3.01 so it can be concluded that the practical worksheets. So it can be concluded that the problem-based worksheets developed meets the criteria feasible, can be used as a good teaching materials
