This book is an amazing resource for teachers who are struggling to help students develop both procedural fluency and conceptual understanding. **–**Dr. Margaret (Peg) Smith, co-author of 5 Practices for Orchestrating Productive Mathematical DiscussionsImagine that you assign a math problem and your students, instead of getting discouraged after not solving it on the first attempt, start working harder--as if on a quest to figure out the answer. What could...