Tolemariam Boka (2024) “Awareness and Perceptions towards Practices of Twenty-First Century Skills in Chemistry Education in the Secondary Schools”, International Journal of Sciences: Basic and Applied Research (IJSBAR), 73(1), pp. 548–578. Available at: https://gssrr.org/JournalOfBasicAndApplied/article/view/17097 (Accessed: 28 September 2025).