classes:  lecturer. should increase more time for practice because the game is difficult, but only 3 sessions of practice are not enough for students to fully understand the problem.  curriculum. should increase more time for practice because the game is difficult, but only 3 sessions of practice are not enough for students to fully understand the problem.  facility. should increase more time for practice because the game is difficult, but only 3 sessions of practice are not enough for students to fully understand the problem.  general. should increase more time for practice because the game is difficult, but only 3 sessions of practice are not enough for students to fully understand the problem.