This article reports an empirical study aiming to investigate students' use of mathematics textbooks in Shanghai and England, with a comparative perspective. The study used mixed methods to collect the data through student questionnaire, student focus group interview and classroom observation. 161 Shanghai seventh- and eighth-grade students and…

We conducted an intervention-based study in secondary classrooms to explore whether the use of geometric transformations can help improve students' ability in constructing auxiliary lines to solve geometric proof problems, especially high-level cognitive problems. A pre- and post-test quasi-experimental design was employed. The participants were…