for instance across oecd countries eight out of ten students report that their teachers tell them what they have to learn in every lesson and seven out of ten students have teachers who ask questions in every lesson to check that students understand what they are learning however according to students this practice is used only occasionally as fewer than one in three students in oecd countries report that their teachers use this practice frequently in their lessons figure shows the reported frequency of both teacherdirected and studentoriented instructional strategies for mathematics