My students got very motivated after I started playing games with them. Lots of games, different games. In this website you find wonderful ones. I usuallly play in teams, because teens love competitions. It �s interesting to make them use more than one sense, and when they stand up amd walk (like in the game with the musical chairs), they are using the right side of the brain - therefore improving their memorization. Try to bring up all those children games (dominoes, memory games, checkers, snap) using the grammar content you want to approach. Nowadays I am preparing a "will" game and I �ll publish it here soon. Good luck!