The purpose of this study was to determine the effect of SETS (Science, Environment,
Technology, Society) learning on the mastery of students' critical thinking abilities using tests
and observations. The type of this research was a quasi experiment. This research used an
experimental class and control class. The sampling technique used was cluster sampling.
To determine the differences in the mastery of critical thinking skills in the control class and
the experimental class, the t-test was carried out with the Polled Variance formula. The …