Use for Life Skills / Home Economics / Nutritional Sciences class - In the Kitchen Baking Challenge - The Chocolate Chip Cookie recipe. It's important to follow the recipe, there's a science and reason behind the ingredients. With this challenge, your bakers get to experience that first hand. 6 different variables for the recipes will show students how changing something will change the outcome of their cookie. Includes sheet that explains whey the ingredients do what they do (I give this after the challenge) and the 2nd sheet includes the recipe and then a section for compare/contrast. I break my class in to teams and assign each the change in the recipe they have to follow. Afterwards, we line up baked cookies and try and guess whey they appear and/or taste different before we review the reasons why.