Return to Article Details PENGEMBANGAN LEMBAR KEGIATAN SISWA BERBASIS PROBLEM SOLVING UNTUK MELATIH KETERAMPILAN PROSES SAINS PADA SUBMATERI REAKSI OKSIDASI REDUKSI (DEVELOPMENT OF WORKSHEET ORIENTED BY PROBLEM SOLVING TO PRACTICE SCIENCE PROCESS SKILL IN THE OXIDATION AND REDUCTION REACTIONS SUBTOPIC) Download Download PDF