"The adventures of high school and junior high students on the last day of school in May 1976"-- IMDb.

Harry, Ron and Hermione, now teenagers, return for their third year at Hogwarts. There they are forced to face escaped prisoner, Sirius Black, who poses a great threat to Harry. In addition to new experiences, Harry must overcome the threats of Dementors, outsmart a werewolf and finally deal with the truth about Sirius and his relationship with his parents. Harry and friends master advanced magic classes, cross time barriers and change the course...

About to enter his second year at Hogwarts School of Witchcraft and Wizardry, Harry Potter is visited by a house-elf named Dobby and warned not to return. Harry ignores his warning and returns to Hogwarts, where strange things begin to happen, as people are becoming petrified, Harry hears a voice which seems to be coming from within the walls, and Harry's newly-discovered and unsettling ability to communicate with snakes turns even his friends against...

Aspiring singer Tim has been dreaming his whole life about attending Mozart All Boys Boarding School. He is ecstatic when he is finally admitted, but his first days at the prestigious school do not turn out as expected. Facing a hostile headmaster, the stresses of first love, and struggling with the authenticity of his singing voice, Tim is intrigued to discover a wondrous secret in the old school building a gateway to a parallel world. He finds himself...