This is an amazing book! A little girl visits her grandmother during the summer in Michigan. Michigan has summer storms and the little girl is terrified of the thunder. The grandmother tells the little that they are going to make a Thunder Cake. In order to make the cake, they have to pay close attention to the storm. When they see lighting, they have to count real slow and stop counting when they hear the thunder. The number counted tells how many miles away the storm is. The grandmother tells her that they need to know how far away the storm is in order to make the cake before it gets to them. The grandmother has a clever way of helping her grand-daughter over come her fears of the thunder. I would use this book for grades 2nd-4th. I would use this book for vocabulary and have students determine the main idea and key supporting details within this text.