classes:  lecturer. Teachers do not put the material on courses, making it difficult to find learning materials, talking, talking on the sidelines too much, rambling.  curriculum. Teachers do not put the material on courses, making it difficult to find learning materials, talking, talking on the sidelines too much, rambling.  facility. Teachers do not put the material on courses, making it difficult to find learning materials, talking, talking on the sidelines too much, rambling.  general. Teachers do not put the material on courses, making it difficult to find learning materials, talking, talking on the sidelines too much, rambling.