Rosalie is a fifteen-year-old girl from Camden, Maine, who is a dreamer and a daring adventurer. When given the opportunity to seize the moment to go on an expedition up the great Mount Megunticook to explore the mysterious Victorian house, she cannot resist. Once inside the house, she finds it holds a magical mystery: one that only her bravery and confidence can solve.

Discrete Mathematical Structures, Sixth Edition, offers a clear and concise presentation of the fundamental concepts of discrete mathematics. Ideal for a one-semester introductory course, this text contains more genuine computer science applications than any other text in the field. This book is written at an appropriate level for a wide variety of majors and non-majors, and assumes a college algebra course as a prerequisite.

What is the relationship between fractions and rational numbers? Can you explain why the product of two fractions between 0 and 1 is less than either factor? How are rational numbers related to irrational numbers, which your students will study in later grades? How much do you know... and how much do you need to know? Helping your upper elementary school students develop a robust understanding of rational numbers requires that you understand this mathematics deeply. But what does that mean? This book focuses on essential knowledge for teachers about rational numbers. It is organised around four big ideas, supported by multiple smaller, interconnected ideas-essential understandings. Taking you beyond a simple introduction to rational numbers, the book will broaden and deepen your mathematical understanding of one of the most challenging topics for students and teachers. It will help you engage your students, anticipate their perplexities, avoid pitfalls and dispel misconceptions. You will also learn to develop appropriate tasks, techniques and tools for assessing students' understanding of the topic. Focus on the ideas that you need to understand thoroughly to teach confidently.

Rosalie is a fifteen-year-old girl from Camden, Maine, who is a dreamer and a daring adventurer. When given the opportunity to seize the moment to go on an expedition up the great Mount Megunticook to explore the mysterious Victorian house, she cannot resist. Once inside the house, she finds it holds a magical mystery: one that only her bravery and confidence can solve.