This is quite clearly a novel that lends itself very well to being taught at High School level, though whether the ethical considerations of the child-on-child violence will impact this remains unknown. However, clearly the fact that the move based on this book is going to be released in 2012 will make this series even more popular, and so perhaps such ethical scruples will be overlooked.
Enotes has a few documents that can help you teaching this novel, and if you click on the first link below you will see the range of lesson ideas that they have. However, you also might like to think about the following ideas that you could use as part of teaching this brilliant novel.
1) As students read the book, they can keep a chart detailing the progression and development of the relationship between Peeta and Katniss, particularly examining their different understandings of what is going on.
2) To do an exercise based on point of view, students can be asked to write from the view point of a different Tribute of a particular scene. For example, how would Peeta describe the first few hours after they enter the Hunger Games? How would Rue describe her relationship with Katniss and what happens?
3) Students can design and create a new arena for the next Hunger Games based on some of the descriptions we are given of other Hunger Games.
4) Students can write a diary written by Prim based on her observations of her sister fighting in the Hunger Games.
5) Students can collect as much information as they can about the 24 Tributes and make up the rest, forming a profile of each one.
6) To discuss themes, students can watch a reality TV show and discuss the various differences between that and the Hunger Games.
These are just a few ideas, but hopefully it will help you to think of more ways you can teach this incredible novel. Good luck!