2

Warm Grasslands! Savanna

4

From the American Revolution to the Civil War

4

After the American Civil War

4

Maddy's Delaware Diary

4

The American Civil War

4

Maddy's Connecticut Diary

4

The Parrot's Sanctuary

4

Maddy's Montana Diary

3

Valleys of the World

3

Solar Eclipse

4

Volcanoes

2

Flint Goes to the Library

4

Maddy's Tennessee Diary

4

Extreme Weather

3

Judge

3

Leif Erikson

3

The Grateful Crane

3

Martin Luther King, Jr.

4

Savanna

3

Charles Darwin

3

Inventors and Inventions

3

Sinkholes of the World

4

Lightning

3

Amerigo Vespucci

4

Chip's Tips on Ghana

2

Flint Goes to a Restaurant

3

Space Exploration

3

Jacques Cousteau

3

Jacques Cartier

4

Chip's Tips on Zimbabwe