The Secret At The Polk Street School Author:Patricia Relly Giff It's idea time, said Ms. Rooney. Who has an idea for us? Dawn put her hand up. She waved it back and forth. Let's listen to Dawn's idea, Said Ms. Rooney. We could find a mystery and solve it, Dawn said. No good, said Lindsa, We don't have a myster. Dawn felt badly. She looked out the window.