The 'Charmed' actress takes on activism in her new book series, 'Hope: Project Middle School.'
Watch the clip from "Good Morning America" below!
Every weekday 7 a.m. - 9 a.m. GOOD MORNING AMERICA brings you the latest breaking news, expert analysis, helpful advice for everyday living, recipes from the best chefs in the country and live performances from the best musicians on television.
Videos