UNIT 1:Today's Travelers 1
Chapter 1 A Family Sees America TogetherA Family Sees America Together 2
Courtney's Texas—Big History,Big Cities,Big Hearts 12
Chapter 2 Volunteer VacationsVolunteer Vacations 18
Who Volunteers? 29
UNIT 2:Family Life 37
Chapter 3 How Alike Are Identical Twins?How Alike Are Identical Twins? 38
Diary of a Triplet Father 52
Chapter 4 The Search for Happiness Through AdoptionThe Search for Happiness Through Adoption 56
Diary of an Adoptive Mother 71
UNIT 3:Technology in Our Everyday Lives 81
Chapter 5 Laptops for the ClassroomLaptops for the Classroom 82
Banking at Home 96
Chapter 6 A New Way to GoA New Way to Go 101
Young Inventors 113
UNIT 4:Healthy Living 121
Chapter 7 The Dangers of Secondhand SmokeThe Dangers of Secondhand Smoke 122
Smoking Facts and Figures 138
Chapter 8 A Healthy Diet for EveryoneA Healthy Diet for Everyone 142
Why Do I Eat When I'm Not Hungry? 158
UNIT 5:International Scientists 169
Chapter 9 Alfred Nobel:A Man of PeaceAlfred Nobel:A Man of Peace 170
Choosing Nobel Prize Winners 185
Chapter 10 Marie Curie:A Twentieth-century WomanMarie Curie:A Twentieth-century Woman 189
Irene Curie 204
UNIT 6:The Earth's Resources and Dangers 213
Chapter 11 Oil as an Important World ResourceOil as an Important World Resource 214
The DO IT Homestead 230
Chapter 12 How Earthquakes HappenHow Earthquakes Happen 236
A Survivor's Story 252
Word List 263