Abstract
The study aimed to enhance the capacity of secondary school science teachers in Nigeria to teach STEM subjects using PhET Simulations, a set of interactive tools for teaching and learning science and mathematics. A descriptive survey research design was employed, targeting all secondary school science teachers in the Ido Local Government Area of Ibadan. The sample comprised 50 teachers, and data was collected using a 24-item questionnaire developed by the researchers, titled "STEM Teachers’ & PhET Simulations (STEMT & PhETSIMS)." The reliability of the questionnaire was confirmed through the Cronbach alpha technique, yielding a coefficient of 0.85, indicating high internal consistency. Data analysis involved calculating the mean and standard deviation to assess teachers' preparedness in using PhET Simulations for STEM education. The findings revealed a significant need for training secondary school teachers in Nigeria to effectively integrate PhET Simulations into their teaching practices. Consequently, the study recommended that government bodies and relevant stakeholders provide continuous professional development opportunities focused on PhET Simulations for STEM educators. This approach is essential for improving STEM education quality in Nigeria, equipping teachers with modern tools and methodologies to engage students in science and mathematics learning.