I have shared to you my experience on teaching Koreans, right? Being their teacher for quite a while, I have also discovered some things that my Korean students like, as well as I use these snacks to reinforce their learning. These snacks will definitely awaken their sleeping bodies. Literally. Whenever they are losing interest in the topic being taught, just say the keywords "I will give ______ to those who can get the highest score in our exam later!", and these sleepy student will be attentive at an instant. Satisfaction guaranteed.