The Math Mysteries series was designed to encourage students to think like math detectives, using clues to solve problems. These four different types of activities are found in each book: story-based mysteries, activities that discover the mysteries found in mathematics, rhyming riddles, and "crack-the-code" problems. All activities are identified in the table of contents with the NCTM standards. Activities integrate problem-solving with numbers and operations and can be used in a variety of ways. The forty engaging activities can be assigned individually, in pairs, as small group assignments, or can be solved together by the whole class.