classes:  lecturer. Teachers need to use the projector, should not write too much board to lose time, assignments can take the class leader to photocopy, do not rhyme on the board to lose time.  curriculum. Teachers need to use the projector, should not write too much board to lose time, assignments can take the class leader to photocopy, do not rhyme on the board to lose time.  facility. Teachers need to use the projector, should not write too much board to lose time, assignments can take the class leader to photocopy, do not rhyme on the board to lose time.  general. Teachers need to use the projector, should not write too much board to lose time, assignments can take the class leader to photocopy, do not rhyme on the board to lose time.