<![CDATA[The research objective of this development is to produce mathematical Student Worksheet (LKS) is characterized by problem based learning to VII grade. In addition, this study also was conducted to determine the criteria LKS is generated based on the aspect of validity, practicality and effectiveness. The kind of research this is the development of research. The development of this research designed by following phases Plomp model of development, namely: prelimininary research, prototyping phase, and assesment phase. The subjects of this research is students of VII grade Ar-Rohmah junior high school Malang academic year 2015/2016 as many as 27 students. From the results of the field trials, found that LKS developed have valid criteria, practical, and effective]]>
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