In science class, students learn by making and living information, enabling them to make sense of knowledge effectively and permanently and to associate it with daily life. Applied science courses make learning more qualified. While science teaching is carried out in application areas such as laboratories, virtual laboratories are used with the development of information technologies today. Virtual laboratories are auxiliary tools that make teaching and learning easier. Virtual environments offer the opportunity to experiment through simulation programs and modeling. In the study, it was examined which of the experiments in the PhET simulation software was suitable for the student gain in the science course curriculum according to the grade level. In the research, a qualitative research method was employed. Simulation programs on the web address "phet.colorado.edu" were examined by document analysis. According to the findings of the study, there are 80 interactive simulation applications in the PhET application that are suitable for student gains in the science curriculum prepared by the Ministry of National Education. In the PhET simulation software, it was determined that most physical experiments can be done according to the student gains in the science course curriculum, and the experiments in the field of biology are limited.