What subject and key stage are you teaching? I personally have tried to find out what the kids in my classes are into. For example, my Yr 8 boys are very into Eminem, so when I needed to teach them how to analyse metre (for an assessment on Macbeth) I taught them the skills by analysing Eminem. Worked a treat! For my Yr 10, when I was teaching persuasive writing I got them to write a letter to a celebrity asking for an autograph, which we have posted off and are awaiting replies. Just a couple of ideas, but this is the type of stuff I do to keep the students interested. Hope it helps.