“Procedural Problem-Solving Approaches Employed by Students in Learning Extensive and Intensive Quantities of Change of State: Procedural Problem-Solving Approaches Employed by Students in Learning Procedural Problem-Solving Approaches Employed by Students in Learning Extensive and Intensive Quantities of Change of State”. Ghana Journal of Education: Issues and Practice, vol. 4, Dec. 2018, pp. 19-43, https://doi.org/10.47963/gje.v4i.492.