3

Zheng He

4

The Willis Tower

2

Who Lives in the Jungle?

3

Nelson Mandela

3

Capes and Peninsulas of the World

3

Neil Armstrong

4

Maddy's Nevada Diary

3

Confucius

4

Maddy's Tennessee Diary

4

Mammals

4

Volcanoes

3

Astronauts

4

Grandpa's Guide Dog

2

Who Works Here?

4

Chip's Tips on Mauritius

3

The Earth

3

Mardi Gras

3

Gravity

4

Maddy's Montana Diary

4

Maddy's Minnesota Diary

4

Patsy and Paul at Machu Picchu in Peru

2

Flint Goes to the Supermarket

4

Gateway Arch

4

Eire of the Desert

4

Maddy's Michigan Diary

4

Chip's Tips on Laos

4

Jewels, Gemstones, and Birthstones

3

Nurse

4

The American Civil War

4

Maddy's Florida Diary