WASHINGTON (AP) - A new ad campaign will urge parents to teach their kids to speak up if they witness school bullying.

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The Ad Council and the Free to Be Foundation are teaming up for the long-term campaign. Television, print and web ads will start running in October.

In one television ad, a girl watches two other girls bullying a schoolmate and doesn't intervene. A narrator tells parents to teach their kids to be more than a bystander.

Online ads will warn parents that their kids regularly encounter negative messages such as "you're worthless" and "everybody hates you."

The ads were unveiled Monday at an anti-bullying summit in Washington hosted by the Department of Education.

Actress and activist Marlo Thomas says schools should adopt zero-tolerance policies and expel kids who bully.