The BED1201: Introduction to Macroeconomics notes are comprehensive instructional materials prepared for undergraduate students in the Department of Economics and Development Studies at Mount Kenya University. They introduce learners to the core principles of macroeconomics, covering topics such as national income accounting, money and banking, public finance, inflation, and international trade and finance. The notes explain key theories—including the Keynesian consumption function, multiplier and accelerator principles, IS–LM model, and comparative advantage—and show how these concepts apply to real-world economic systems. Each chapter provides clear definitions, step-by-step explanations, and worked examples, followed by review questions for practice. The material also includes sample examination papers and recommended texts for further reading. Overall, these notes are designed to give students a solid foundation in macroeconomic analysis, equipping them with both theoretical knowledge and practical skills for understanding national and global economic activities.