The purpose of this study is to examine the effect of SNS use by prospective early childhood
teachers in PBL class on flow and problem-solving skills. For this purpose, the PBL class was
conducted for eight weeks with 44 prospective students in the early childhood social studies course,
and measured the classroom situation in terms of usefulness of SNS, flow, and problem-solving
skills by using a cognitive test. To analyze the measured values, frequency analysis, reliability
analysis, factor analysis, and correlation analysis were performed. Also, to verify the hypotheses set
in this study, structural equation modeling was used based on AMOS. The result is as follows: First,
in PBL-based class, use of SNS had a positive effect on flow. Second, flow had a direct influence
on problem-solving skills. Third, however, use of SNS did not have a direct influence on
problem-solving skills and, therefore, flow plays a mediating role for problem-solving skills. Based
on the result, in the study, it was found that the use of SNS in PBL class can increase interest,
motivation, and participation of students and they then become more willing to contribute to class
activities