This paired text science unit focuses on helping students answer this Big Question: How can science affect sports? This unit contains two lessons and a unit assessment. Each lesson includes teacher support pages, a 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: What's Holding You Back? (Level Y) and Balance (Level W). An answer key is also included.