Regardless of methodology, almost all researchers engage in a number of similar components in conducting their research. All of these components include, purpose and question of the research, research approach and methods, population and sample of subjects, data collection (e.g. tests or other measuring instruments, a description of procedures to be followed), a description of intended data analysis and interpretation, and conclusions. Those components are also considered as the key elements in doing critical analysis of research papers based on methodological perspective. In this text, I shall present my own critical analysis from methodological perspective of Lederman’s research paper titled Teachers’ understanding of the nature of science and classroom practice: factors that facilitate or impede the relationship.