Taressa Bedada. Enhancing how to practice writing chemical symbols and formulae through a competency-based curriculum approach among environmental science trainees at Oromia State University, Chiro Education Campus, Ethiopia. STAR [Internet]. 2026 Jun. 30 [cited 2026 Jul. 1];15(2):11-24. Available from: https://journals.wgu.edu.et/index.php/star/article/view/1939