A playbook for working with and training girls to be activists of their own social movements;;Drawing from a diverse collection of interviews with women and girl activists, Powered by Girl is both a journalistic exploration of how girls have embraced activism and a guide for adults who want to support their organizing. Here we learn about the intergenerational support behind thirteen-year-old Julia Bluhm when she got Seventeen to go Photoshop free; nineteen-year-old Celeste Montano, who pressed Google to diversify their Doodles; and sixteen-year-old Yas Necati, who campaigns for better sex education. And we learn what experienced adult activists say about how to scaffold girls’ social-change work. Brown argues that adults shouldn’t encourage girls to lean in. Rather, girls should be supported in creating their own movements-disrupting the narrative, developing their own ideas-on their own terms.