Corrected entry: In the musical scene during graduation, when Gabriella is introduced there is a shot of her mom in the audience, but if we look at the text sent by Troy to Rocketman it appears that Troy drove all the way, therefore Gabriella's mom should still be in Stanford.
Corrected entry: In the scene with the prom, Zeke has on his sneakers (red and white), but when the rehearsal is finished, he has dress shoes on.
Corrected entry: In the basketball game at the beginning when Rocketman joins the game, he is wearing white pants and a white jacket. He takes the jacket off to reveal the red vest but doesn't take the pants off. In the next shot he is wearing red shorts.
Corrected entry: When Troy breaks into the school and goes into the locker room, he removes his jacket and throws it on the floor. After he has put his East High singlet on, it shows a long shot and the jacket has vanished from the floor.
Corrected entry: Throughout the whole movie, every time students are seen going down the hall, where Troy's locker is, the print on the locker titles are different each time. One time it'll be plain, next time it'll have a wildcat on it.
Corrected entry: Troy has given his locker to 'Rocketman' but returns later to retrieve his iconic basketball vest from the same locker.
Corrected entry: When Troy sings his song alone in the darkened gym, there are six retired jerseys hanging on the wall, including his own and Chad's. Schools don't usually retire the jerseys of athletes who are still there.
Corrected entry: In the scene when Gabriella is in her room after talking to Troy about her leaving for college early, she looks at a picture of her and Troy from the scene in HSM2 when they sneak a picnic on the golf course right before the get caught by Mr. Fulton. In that scene in HSM2 there was no one there to take that picture of them.