What is the name of this book?

I read this book in 8th grade English class. It was set in and an apocalyptic future. There were these teenagers who got invites to play a virtual game. It turned out that they were being trained to live on another planet through the game. The last time they went in, they couldn’t leave the “game”. If it’s called The Game, I’m gonna kick myself. This was about 11 years ago.