In my school, we hace created an email list to exchange exercises, summaries and things like that with the students in Bachillerato. Sometimes I send them videos they have to watch and then if they send me an email answering some questions about the video, they get a prize like more mark, or even some sweets (they love them even if they say they´re too "old")
In the last unit in we have studied food and cooking and in the book they had a text about Jamie Olivier, so I sent them this video and they had to answer the following questions:
1) Which are the ingredients?
2) What are the advantages of making an omelette?
3) What can you eat together with your omelette?
(they can also make the omelette and send a photo by email, it´s fun and it teaches sth more than English!
http://www.youtube.com/watch?v=AgHgbn_sVUw