Agnes,
I enjoyed reading your lesson plan on cultural diffusion. What about this for your hook???
Can you show a video of a Karaoke festival? Then perhaps play some music and project the lyrics and have the students sign along? That would at least get their attention.
I am a big fan of "hands on"......
Could you bring in a cup of noodles, sushi and rice.....kids could see and sample -- food always seems to get kids to focus.
Pat Lamkie