How to use SMART Reading Reading Skills in This Book Unit 1 : Cats and Dogs Unit 2 : Why Do We Eat Three Meals a Day? Unit 3 : Emperor Penguins Unit 4 : Food Superstitions Unit 5 : A Guide Dog Unit 6 : Body Measurement Unit 7 : Igloos,Houses of Ice Unit 8 : Candy Canes on Christmas Unit 9 : Valentine's Day Unit 10 : Salt and Ice Unit 11 : Rudolph, the Red-Nosed Reindeer Unit 12 : A Fire Drill Unit 13 : Why Is a Soccer Ball Black and White? Unit 14 : Venus Flytraps Unit 15 : Internet Manners Unit 16 : Fireflies Unit 17 : Desert Food Unit 18 : J.K. Rowling Unit 19 : Kiwi Birds Unit 20 : My Favorite Soft Drink