The knowledge base on various forms of structuring students' learning by ability grouping is more robust than that on teachers' instructional practices being implemented within these groupings. The present study examines if student-reported mathematics teachers' instructional practices vary among schools with different degrees of implementing…

Girls tend to outperform boys in reading tests, while they usually lag behind boys in mathematics. However, the size of the gender gap varies to a great extent between countries. While the existing literature explains these differences as being mainly due to cultural factors, this paper explores whether this cross-country variation is related to…