The worksheet is deditcated to advanced students who want to learn about British and American English, more precisely about some slang words. The additional material is a youtube movie (https://www.youtube.com/results?search_query=hugh+laurie+slang) that presents a four minute long bit from Ellen DeGenres talk show, in which Ellen and Hugh Laurie interview each other on British and American slang words. I believe this exercise may get the students interested in British and American versions of English.
