summer vacation is the vacation ( long ) Vietnamese students have vacation than American students. ( few ) students today seem to have time for relaxation. ( little ) christmas is one of the vacation in American. ( important ) this old woman has money than all of her daughters. ( much ) bill is than you. ( good ) Vietnamese students work than American students. ( hard ) he is the teacher, even though he has the experience. ( good - little ) english class is than history class. ( interesting )