Continuity: 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.

Continuity: At Riley's Garage, when Troy and Chad rummage through the junk looking for the radiator cap, Troy's boxers are light grey, but next shot when he lifts the truck's hood his boxers are black.

Other: At graduation, after Troy is handed the diploma, in the overhead shot the graduates on the left and right stand-up from their seats, then turn and walk towards each other. All their seats simply disappear between shots. Obviously done deliberately for the dance sequence, but a mistake nonetheless.

Continuity: When Tiara is at Sharpay's locker, she holds out the pink shopping bag with her left hand, but next close-up it's in Tiara's right hand.

Continuity: When Coach Bolton confronts Troy about Juliard, and then when Troy is at East High at his locker changing into his Wildcat jersey, he is wearing dark boxers. When Troy is on the stairs singing "Scream", before reaching the cafeteria, his boxers are light blue.

Continuity: When Troy is with Gabriella in her room, having eaten strawberries and pizza, Troy is wearing white boxers, but when he is walking down the road (after his truck didn't start) his boxers are dark (we see the space between the top of his pants/belt and the bottom of his white t-shirt).

Continuity: When Gabriella joins Troy on the roof, she places her bag on the step before she picks Troy's tux. The bag's position changes throughout this scene.

Revealing: After Gabriella and Troy convince everyone to stick with the musical, when Ms. Darbus asks everyone to line up she walks to stage left (viewer's right) and steps behind her white mark, on the otherwise clean stage floor.

Continuity: When Taylor reads Gabriella's letter from Stanford University, the envelope in her hand is vertical, then horizontal and back to vertical.

Visible crew/equipment: The reflector screen is reflected in Kelsi's eyeglasses, in many shots throughout the film.

Continuity: 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.

Continuity: After their musical number during the show, when Troy hands Gabrielle the bouquet of roses, the white ribbon is either higher up in the close-ups or lower down in the wideshots.

Continuity: Chad and Troy bring Zeke's dessert to Gabriella and Taylor, with orders to polish off the evidence, when the girls are working on the yearbook. The photos and papers on their desks change between shots.

Continuity: When Troy is focused on the game at the beginning, his hair is soaking wet due to sweat perhaps, but when he is in the locker room during half time, his hair is dry.

Factual error: When Troy calls to Gabriela from the rooftop, the clock on the school's facade reads about 7:46, but the sun is almost directly overhead. There's no way it's quarter to eight in the morning.

Continuity: 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.

Continuity: After Kelsi signs everyone up, and they stand around the piano complaining, in the shots facing Gabriella her hands are on the piano to the left and right of the notepad. In the shots facing Kelsi, Gabriella stands to the side of the notepad.

Continuity: When Gabriella and Troy are up in the treehouse, the three flower hair barrettes on Gabriella's right side form a triangle. Depending on the angle of the shot, the 'triangle' of flowers are formed with one flower at the top and two lower, or two flowers at the top with one lower flower.

Continuity: When Gabriella holds up the toy Robot Rob to Troy, the robot's left arm sticks out in one shot, but is down to its side in the next.

Continuity: In the musical number at graduation, Ryan's shirt un-tucks and re-tucks several times during the dancing.