Baking has evolved over thousands of years from simple flatbreads to the wide variety of baked goods we see today. The document outlines the history of baking from early flatbreads developed by ancient civilizations to improvements in milling, leavening techniques, and the introduction of baking to America by European colonists. It also provides learning activities on baking ingredients and their functions, tools and equipment used in baking, and the basic principles of baking such as mixing, chemical and physical changes during the baking process.