Unit 01 Houses

R1 Culture / Trulli: Traditional Italian Houses
R2 Zoology / Beaver Homes

Unit 02 Colors

R1 Biology / Color-Blindness
R2 Psychology / The Effects of Colors

Unit 03 Safety

R1 Life / Always Be Ready to Go
R2 Health / Be Smart When You Exercise

Unit 04 Curves

R1 Psychology / The Beauty of Curves
R2 Physics / The Banana Kick

Unit 05 Songs

R1 Social Studies / The Birthday Song
R2 History / A Gold Rush Song

Unit 06 Volcanoes

R1 Archaeology / The Lost City of Pompeii
R2 Geology / Powerful Volcanoes

Unit 07 Accidents

R1 Social Studies / The Popsicle Project
R2 Life / Accidental and Delicious

Unit 08 Luck

R1 Social Studies / The Strange World of Murphy’s Law
R2 Culture / Lucky Objects Around the World

Unit 09 Animals

R1 Entertainment / Come to the City Insect Museum!
R2 Zoology / The Angels of the Sea

Unit 10 Dolls

R1 Entertainment / Barbie: The Most Popular Doll
R2 Technology / Useful Dummies

Unit 11 Writing

R1 Life / Five Steps for Good Handwriting
R2 Art / The Art of Calligraphy

Unit 12 The Tundra

R1 Zoology / Amazing Reindeer
R2 Culture / The Nenets: People of the Tundra

Unit 13 Relationships

R1 Life / A Friend Called Freedom
R2 Literature / The Giving Tree

Unit 14 Meals

R1 Culture / Table Manners Around the World
R2 Health / Why Is Breakfast Important?

Unit 15 Eyesight

R1 Zoology / Animals’ Amazing Eyesight
R2 Health / Healthy Eyesight

Unit 16 Holidays

R1 Social Studies / La Toussaint
R2 Culture / A Christmas Devil

*정답 및 해설 [책 속의 책]