You cant learn to hit a three-point shot without missing a lot of shots. You cant learn to play a piece of music correctly without striking a lot of wrong notes. And, as Nancy Anderson explains in Whats Right About Wrong Answers, you cant learn math without making mistakes. Nancy turns mistakes on their head and helps you cleverly use them to students advantage. Each of the twenty-two activities in this book focuses on important ideas in grades 45 mathematics. By examining comic strips, letters to a fictitious math expert from confused students, and sample student work containing mistakes, your learners explore typical math mistakes, reflect on why theyre wrong, and move toward deeper understanding.