This paired text science unit focuses on helping students answer this Big Question: Why do animals have different kinds of teeth? This unit contains two lessons and a unit assessment. Each lesson includes teacher support pages, a picture dictionary, a reading selection, and a variety of written and oral activities, including reading comprehension, close reading, vocabulary, and text-based writing activities. The reading selections in this unit are: Goats (Level G) and Wild About Food (Level H). An answer key is also included.