The document summarizes a student's final project experimenting with how different types of cookie sheets affect cookie baking. The student researched various cookie sheet materials and conducted an experiment baking cookies on aluminum, tin, and silicone cookie sheets. Their hypothesis that silicone would produce the best results proved correct, as the silicone cookies turned out evenly cooked, soft and moist while the aluminum cookies were uneven, doughy and undercooked and the tin cookies were dry and hard. The experiment supported the information that heavier, lighter colored cookie sheets bake cookies better than cheaper, flimsier dark colored sheets.