| UNIT 01 | We Are Twins
| UNIT 02 | Fingerprints
| UNIT 03 | A Perfect Shell
| UNIT 04 | Homes around the World
| UNIT 05 | Home Alone
| UNIT 06 | Big Game
| UNIT 07 | Achoo!
| UNIT 08 | Soups in Asia
| UNIT 09 | Why Do Elephants Have a Trunk?
| UNIT 10 | Elephant Trunk
| UNIT 11 | We’re Not Afraid
| UNIT 12 | Field Trip
| UNIT 13 | No More Bullies!
| UNIT 14 | Netiquette
| UNIT 15 | Animal Teeth
| UNIT 16 | Some Animals Lay Eggs
| UNIT 17 | Night Walk
| UNIT 18 | Star Jar
| UNIT 19 | A Story of Abdul
| UNIT 20 | Working Children


부록
Workbook, 정답 및 해설 (별책)
MP3 CD 1장