Western people show exclamation even over trifles. This phenomenon isn't found an oriental culture that appreciates people who control their feeling and taciturn. We can usually see Americans who are moved so easily by things that Koreans aren't effected by. This means they are accustomed to expressing feeling freely and frankly. In Western culture, they start a conversation about the weather when they meet someone for the first time: "It's a lovely day, isn't it?" This is reference to the inclement weather in England. The people who live in an area with nice weather like Korea aren't touched by this kind of thing but Englishmen can be impressed.
The link has changed several times since I first posted it to waygook.org a couple years ago, so check back often. I'll also direct your attention to BarryFunEnglish, which has lots of supplemental material for the Korean elementary school curriculum, as well as some worksheet templates.