Fitriani, H. et al. 2022. Development of Evaluative-Process Learning Tools Integrated with Conceptual-Problem-Based Learning Models: Study of Its Validity and Effectiveness to Train Critical Thinking. International Journal of Essential Competencies in Education. 1, 1 (Jun. 2022), 27–37. DOI:https://doi.org/10.36312/ijece.v1i1.736.