In this paper, I examined the assessment of and instructions for critical reading in expository texts for first-year students at a junior high school. I examined tree points in the experimental practice: (a) the efficiency of using the new taxonomy as a critical reading framework; (b) setting the critical reading rubric to improve instruction and assessment; and (c) the effectiveness of the assessment method to improve reflective thinking as a target to consider a typical learner’s reading feedback. By using a new taxonomy in experimental practice, it is important for the teacher to clearly distinguish the critical skill and disposition, to understand the learner’s reading level for cognitive skill and meta-cognition. This process will help many learners to capture and evaluate the argument. Furthermore, with encouragement to provide feedback will support understanding to realize reflective reading.