<![CDATA[The purpose of the Research and Development is to Lembar Kerja Siswa a valid, practical, effective worksheet about fractions for elementary school students. Based on the assessment of the material experts, media experts, and users of both teachers and students can be obtained the following information. First, the development of PBL-based worksheet has fulfilled the valid criteria of 85%. Second, it fulfills practical criteria with an average overall response of teacher and student questionnaires of 87%. Third, it has fulfilled the effective criteria with an overall teacher and student response questionnaire of 87%. The results showed that the development of PBL-based worksheet based on folding boards met valid, practical, and effective criteria so that it was appropriate to be used as teaching material in learning.]]>
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