<![CDATA[Student Worksheets (LKPD) are printed teaching materials in the form of sheets of paper containing tasks to be completed by students. This study aims to develop LKPD based on Problem Based Learning (PBL), determine the conceptual and procedural feasibility of LKPD, determine the assessment of chemistry teachers and student responses to the developed LKPD. The development was carried out using the Lee & Owens model. The instruments used were teacher interview sheets and student needs analysis questionnaires. The resulting product was then validated by a team of media experts and material experts, and assessed by teachers. Next, the LKPD product was tested with one-on-one trials and small group trials. The data analysis techniques used were qualitative data analysis and quantitative data analysis. The results of the study showed that the developed LKPD based on Problem Based Learning (PBL) was declared conceptually and procedurally feasible. Media expert validation obtained a score of 4.57 (Very Appropriate) and material expert validation with a score of 4.4 (Very Appropriate) and teacher assessment with a score of 4.57 (Very Appropriate) and student responses with one-on-one trials and small group trials obtained a percentage of 84,9% and 84,8% with the criteria of "Very Good". Based on the development and research, it can be concluded that Problem Based Learning (PBL) Based Student Worksheets are valid and suitable for use in chemistry learning.]]>
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