This study aimed to determine the effect of the blended learning model on the problem-solving skills of students with high and low self-efficacy as well as their interactions. The research method used was a quasi-experimental research with nonequivalent control group design. The population of this study was all tenth-grade science students of SMA Al-Azhar 3 Bandar Lampung. The sampling technique used was random. The instruments employed in this study were a test in the form of essay questions to measure students’ problem-solving skills, a questionnaire to measure self-efficacy, and observation sheets. The hypothesis had been tested using 2 way ANOVA. The results of the hypothesis testing are as follows: 1) there was an effect of using the blended learning model on problem-solving skills in terms of self-efficacy, 2) there was an effect of self-efficacy on problem-solving abilities, and 3) there was no interaction between the blended learning model and self-efficacy.
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