High school Musical 3 Senior Year was a DS game released around the time the 3rd movie came out.
The Game includes all songs from the 3rd movie and has three difficulty levels. It also has quizzes.
The objective of the game is to complete a year book that is blank when you start out, but things for the yearbook can be unlocked through gameplay. (Getting certain star ranks on songs and getting certain characters in quizzes)
The game uses the stylus and buttons for gameplay and also has an option to change controls to fit left handed players better.