The objective of this article is to identify and discuss the views of teachers of physics-chemistry (Ph-Ch) and Life and Earth Sciences (LES) on the use and effectiveness of interactive simulations PhET (Physics Education Technology) in student teaching and learning. A survey research method was used in this study. 114 Moroccan science teachers (67 Ph-Ch; 47 LES) at middle and high schools were surveyed. The quantitative analysis was performed to provide insight into who uses PhET simulations, why they use them, and how they are used. The data collected was analyzed using Statistical Package for the Social Sciences (SPSS) software. The results indicate that the use of interactive simulations in investigative science teaching and learning is very effective for both teachers and students, despite the presence of a set of obstacles that hinder the use of classroom simulations. The implication of this research is that the use of interactive simulations in science teaching in Morocco can enhance learning activities and help students to understand scientific concepts effectively.