Taressa Bedada 2026. 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. Journal of Science, Technology and Arts Research. 15, 2 (Jun. 2026), 11–24. DOI:https://doi.org/10.20372/star.V15.i2.02.