Effect of Virtual Blended Learning Models with PhET Assistance on Students' Mastery of Concepts in Fluid Material

This study aims to determine the effect of blended learning virtual learning models on PhET-assisted fluid material on students' conceptual comprehension. The design model used in this research is an experiment with a pretest-posttest type. The sample used in this study was Class XI IPA C as the experimental object consisting of 35 students in one class. The test given was in the form of a concept comprehension ability test consisting of 10 multiple choice questions with a maximum score of 100. The results showed that the average posttest score was higher than the average pretest score in the experimental class. In addition, an N-gain value of 0.62 was obtained, which means that the value of increasing student learning outcomes using the phet-assisted virtual blended learning model is in the medium category. This shows that the use of PhET-assisted blended learning virtual models has an effect on students' mastery of concepts.