Purba, I. R. ANALISIS MODEL PROBLEM BASED LEARNING MENGGUNAKAN QUASI EKSPERIMEN DESIGN TERHADAP HASIL BELAJAR IPA SISWA SMP NEGERI 1 JORLANG HATARAN: ANALYSIS OF PROBLEM BASED LEARNING MODEL USING QUASI DESIGN EXPERIMENT ON THE HIGH SCHOOL STUDENTS’ SCIENCE LEARNING OUTCOMES STATE 1 JORLANG HATARAN. JMO 2021, 3, 26-34.