The Headmaster Prof. Crumb resembles Prof. Dumbledore, Justin is a natural at the wizard sport 12 Ball (Harry was a natural at the wizard sport Quidditch), the uniform are black robes with gold shield-shaped crests and black framed glasses like Harry's and Wiz-tech resembles Hogwarts, both internally and in external shots. Also Alex alludes to this when she comments on how Justin looks in the uniform.