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2.1.1 City Friends, Country Friends 2.1.2 Explore the Galaxy (Space and Technology) 2.1.3 A Home in the Wilderness 2.1.4 Trek to the Top (Social Studies) 2.1.5 Sue's Hummingbird 2.2.1 Amazing Animals (Social Studies) 2.2.2 The First Big Game 2.2.3 Sea Turtles at Risk (Life Science) 2.2.4 Silver and Stripes 2.2.5 The Pilgrim's First Year (Social Studies) 2.3.1 The Sidekick 2.3.2 Mail It... From Here to There (Social Studies) 2.3.3 Animal Helpers (Life Science) 2.3.4 The Tortilla Factory 2.3.5 Ideas to Inventions (Social Studies) 2.4.1 Windows to the Past (Social Studies) 2.4.2 Many Plants, Many Places (Life Science) 2.4.3 The Wonderful World of Birds (Life Science) 2.4.4 Simone's Travels 2.4.5 Here Comes a Storm (Earth Science) 2.5.1 Goods and Services (Social Studies) 2.5.2 A Day in the Life of a Vet (Life Science) 2.5.3 Training Peanut 2.5.4 Taking Care of the Earth (Social Studies) 2.5.5 Marty's Job 2.6.1 Baseball Heroes (Social Studies) 2.6.2 Home of the Brave (Social Studies) 2.6.3 Family Traditions and Celebrations (Social Studies) 2.6.4 Life on the Ranch 2.6.5 Winter Holidays