Development of Learning Device Based on 21st Century Skill With Implementation of Problem Based Learning to Increase Critical Thinking Skill of Students on Polyhedron for Grade 8th Junior High School
Journal of Educational Sciences
doi 10.31258/jes.4.2.p.273-284
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Date
April 23, 2020
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Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau