There's a section in each lesson of the 5th grade textbook where the students sing an English song that goes with the words in the chapter. This weeks lesson wasn't a song... it was a rap (Aka: RAP BOX)!
I gave the group of students who rapped the loudest and had the best "rapping hand gestures" an extra point for their team! It was quite possibly the funniest thing I've ever seen in one of my classes in Korea!