Speakout Advanced p 86. Waiting for Superman. Extra Film

Davis Guggenheim, the Academy Award-winning director of An Inconvenient Truth, has issued a new clarion call for our times: Waiting for Superman, a new film that takes a hard look at America’s failing public education system, the children it’s leaving behind, and the reformers trying to turn things around.
clarion call: a clear message or request for people to do something. E.g. a clarion call for action.