The purpose of this study is to examine the perceptions of pre-service mathematics teachers, their knowledge about assessment systems, and their ways of applying the principles of setting items. For this study, 156 questionnaires were obtained from pre-service mathematics teachers, and out of them, 88 significant questionnaires were analyzed based on MKT (Mathematical Knowledge for Teaching); some research questions were cross-analyzed. The results of this study are as follows: Most pre-service teachers answered positively that they knew the assessment system and the whole procedure. They showed positive responses to the necessity of the practice. However, the percentage of correct answers were somewhat lower in fields such as achievement standards-based assessment, dual-purpose classification tables, and mathematics assessment procedures.
Meanwhile, some references had different descriptions about diagnostic assessment. These differences can lead to different recognitions depending on the lecturer or textbook. We suggest that in pre-service teacher education courses, it is essential to learn and practice the development of math items.