Continuity mistake: The post-callback basketball scene's countdown clock isn't accurate. If you try counting with it, you'll notice that it reaches 0 by the time that the ball's being passed to Troy.
Continuity mistake: When the cheese fries land on Sharpay, they are all standing right beside the staircase (there are three levels of ledge at the base of the staircase), with Jason and others on the ledge by the banister. Then Sharpay screams. Next shot is of Martha standing atop her table, with the staircase and ledges visible behind them, as they all look to the right, as if Sharpay is farther off in the cafeteria. Problem is that Sharpay, Ryan, Jason, and all the others have vanished, though they all should be right beside that staircase behind Martha's table. (00:43:20)Super Grover
Continuity mistake: Troy and other members of the basketball team say that the big basketball game is in 2 weeks, and the scholastic decathlon members say that their championship is in 1 week, but near the end of the movie their championships are on the same day. We know Sharpay couldn't have changed it because all she asked to be changed was the call back date.
Continuity mistake: In the song 'Breaking Free,' Troy's microphone constantly jumps from one hand to the other as the shot changes but too quickly for it to be because he moved it.
Continuity mistake: When Sharpay gets french fries dumped on her shirt, her white under shirt has nacho cheese all over it. But in the next scene when she talks to Zeke, her under shirt is clean again.
Continuity mistake: Troy is running down the stairs to get to the audition, his boxers are blue. However when he says " I'll sing with her", his boxers are now white.
Continuity mistake: Near the end, at the end of "Breaking Free" , Gabriella has the mic in one hand, but in the next shot it's in the other hand.
Continuity mistake: Just as Miss Darbus walks onto the stage to announce the auditions have begun, Troy quickly hides behind the curtain. However, when they cut to a farther back view, the curtains aren't moving.
Continuity mistake: In the locker room, the coach's sandwich goes from his hand to the desk to his hand and switches hands a few times in this scene. It also appears to get bigger and smaller a few times.