In China, when summer vacation comes, teachers will give students a lot of homework, just in case students forget about the knowledge they have learnt. I remembered that when summer vacation ended, my mother would check my homework and then I realized that I hadn't done it. So the last few days were always my busy day. While in western countries, holiday means to take relax and the students will never have homework. Foreign students will never understand why homework is necessary in the long holiday. It is known to all that Asian people have higher IQ generally, because the way to study is different. Asian students work much harder while western students trend to learn in the easy way. As the saying that no pain, no gain, the effect of homework helps students get improved.