Abstract
This study aims to determine the effect of inductive thinking learning models on the understanding of science concepts, science process skills and critical thinking abilities of junior high school students. The study population was all eighth grade students of SMP Negeri 1 Masbagik, totaling 318 students. The research sample consisted of 192 students consisting of 6 classes. The research method is quasy experimental with a non equivalent control group design. The experimental group and the control group were randomly determined. Data collection uses a science concept mastery test instrument, a science process skills assessment sheet, and a critical thinking ability test. Hypothesis testing uses the technique of independent sample t test, manova test and regression test. The results showed that: (1) The learning model of inductive thinking influences the understanding of the concept of science; (2) The inductive thinking learning model influences the science process skills; and (3) Inductive thinking learning model influences the critical thinking ability of students of SMPN 1 Masbagik.