The purpose of this study was to investigate the effects of the activities established based on the theory of successful intelligence in the Social Studies course for 4th grades in primary school on students’ thinking skills. In the study, the experimental design of pre- and post-test with control group, one of the actual trial models, was used. The study group consisted of two 4th grade classes that were determined through the non-random purposeful selection. In the study, the data were collected through the scale of critical thinking skill, the Torrance test of creative thinking, and the inventory of problem-solving for children. The data obtained in the study were analyzed by transferring them to the SPSS setting. According to the study results, while there was a significant difference between the pre-test and post-test scores for critical thinking skills of the students in experimental group, there was no significant difference between the pretest and post-test scores of the students in control group. In the creative thinking skills, there was a difference between the pretest-posttest scores of the students in the experimental group in favor of the experimental group. In problem-solving skills, while there was a significant difference between the pre-test and post-test scores of the students in experimental group, there was a significant difference between the pre-test and post-test scores of the students in control group in favor of the post-test. Teachers could teach the lessons through activities that are based on the theory of successful intelligence and documented to make positive contributions to improving the thinking skills of students and practicable for students in every lesson