Connect - Your Study and Testing Program with e-book - is included with each new copy of the text. The sixth edition of Sayre/Morris Principles of Macroeconomics continues to deliver the writing style and features that have defined it for the first five editions. Where many first year books have a "micro" author and a "macro" author, Sayre/Morris takes a different approach by fully collaborating on all writing for all the chapters in both the micro and macro books. This approach delivers a careful integration between the micro and macro books that is unique. Nor is Sayre/Morris an adaptation of a US title, but is rather a book that was written and developed over many years of class testing at the authors' school. Sayre/Morris pioneered the idea of integrating the study guide into the texts – something that has recently been copied, but not equaled. It is organized into three main sections (Review, Answered Questions and Problems, Unanswered Parallel Problems) that firstly provide a review of the material in the chapter, and then goes on to give students practice questions which cover every concept that the students have learned about in the chapter, providing them with the practice that is necessary to excel in their principles course and that follows the authors belief that students learn economics "by doing economics". Sayre/Morris offers proven technology solutions that are focused on helping students succeed. Connect provides students with an online self-study tool that includes an integrated eBook and study resources, while optional Lyryx Assessment Macroeconomics contains algorithmic problems tied to the Sayre/Morris text, unlimited opportunity for students to practice, and automatic grading with extensive feedback for students and instructors. Connect is included with each new Sayre/Morris print text at no additional cost. Lyryx Assessment Macroeconomics is available to package with the Sayre/Morris text at a small additional cost.