Read the【Case Reflection】in this section and think about the questions: Please analyse the reasons.

Mr W had taught the graduating class of a senior middle school for many years. Upon the school's request, he was transferred to teach the first-year class. Through careful preparation, he sorted out all the testing items of the College Entrance Examination（CEE）from each unit of the textbook and taught them in class. However, it turned out that his students were not all that engaged in the class, and their results in the unit exams were not all that satisfactory.

Please analyse the reasons.