classes:  lecturer. His teaching contributes to a high degree of initiative for students, which is sometimes a little counterproductive and makes it difficult to grasp the lectures of students.  curriculum. His teaching contributes to a high degree of initiative for students, which is sometimes a little counterproductive and makes it difficult to grasp the lectures of students.  facility. His teaching contributes to a high degree of initiative for students, which is sometimes a little counterproductive and makes it difficult to grasp the lectures of students.  general. His teaching contributes to a high degree of initiative for students, which is sometimes a little counterproductive and makes it difficult to grasp the lectures of students.