“Expelled” (** out of four) was an occasionally funny teen comedy about a perpetual wiseguy (Cameron Dallas) who gets expelled from high school after numerous pranks and hatches a scheme with his best friend (Matt Shively) to hide it from his strict parents and blackmail his school principal to get back in! Overly silly and contrived although there are some laughs and some sharp dialogue that you don’t normally find in teen high-school comedies. Dallas ranges from charismatic to smarmy in the lead. Not a bad try but not a sufficient reason not to watch “Mean Girls” or “Ferris Bueller’s Day Off” instead.