Abstract
Based on the data collected through observations, interviews with teachers and some students, and learning tools used in schools it is known that there are problems in learning. One of the problem is the unavailability of learning tools such as lesson plans and students’ worksheet that are in accordance with the 2013 curriculum. Therefore, it is necessary to develop problem based learning oriented learning tools in accordance with the 2013 curriculum in order to be able to facilitate students to develop their thinking skills through problem solving activities and improve students' learning competencies. The purpose of this study was to develop a learning tool oriented problem based learning for valid. This type of research is development research using the Plomp model. The development stage of the Plomp model consists of 3 stages, namely 1) the preliminary research phase, 2) the development or prototyping stage, and 3) the assessment phase. The results showed that the learning tool that based on problem based learning for senior high school was valid.
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