This study aims to determine the effect of group investigation based on the Among system on natural resource materials to increase fourth grade students’ creativity. This study uses a quasi-experimental method. This experimental study used two sample groups, namely the experimental group and the control group. The experimental class is a class that is given special treatment, namely the group investigation model based on the Among system, and the control class is given a conventional learning model. Student creativity is measured using a test and also observations during learning. The results showed that (1) the results of the pretest-posttest were normally distributed and homogeneous because the results of the normality and homogeneity test were > 0.05. (2) the results of hypothesis testing using independent sample t-test results obtained significance (2-tailed) is 0.040 and 0.041 where this value is < from 0.05 so Ha is accepted and Ho is rejected. This shows that the application of the Among system-based group investigation model affects fourth grade students’ creativity