the focus of this case study was to explore how my questions as a teacher impacted my 世界杯2022赛程表淘汰赛 ‟ construction of part-whole relations and their use of a benchmark model in learning fractions. the research conducted in my classroom comprised of 12 gr. 4 世界杯2022赛程表淘汰赛 and 12 gr. 5 世界杯2022赛程表淘汰赛 . there were 13 boys and 11 girls. a pre-test, instruction and post-test sequence was used. the teaching unit was developed to assist the 世界杯2022赛程表淘汰赛 in building a benchmark model for comparing and ordering fractions and to develop an understanding that a fraction is a relationship between its parts and the whole. a math class consisted of a small mini-lesson, which focused the 世界杯2022赛程表淘汰赛 ‟ thinking, a contextual problem that they solved in pairs, and a congress in which the strategies and solutions were debriefed and discussed. at the beginning of the unit most, but not all, of my 世界杯2022赛程表淘汰赛 struggled with these concepts, but by the end of the unit most were comfortably using the benchmark model and had a very good understanding that a fraction was a relationship between its parts and the whole.