4

Windsor Castle, England

4

Extreme Weather

3

Body Systems

1

Weather Signs

4

Chip's Tips on Egypt

3

Saturn

3

Harbors of the World

4

Chip's Tips on New Zealand

4

Sources of Energy

1

My First Book of Things on the Farm

3

The Sun

2

This Lad Jack

1

Weather Signs

4

Hurricanes

4

Maddy's Minnesota Diary

2

How to Draw

4

Maddy's Wyoming Diary

3

Pollution

4

The Willis Tower

4

Patsy and Paul at Machu Picchu in Peru

3

Neptune

3

Energy

2

Treeless Plains! Steppe

3

Magnetism

2

What is this? Things on the Farm

2

The Three Little Pigs and the Power of Bricks

4

Sossusvlei Dunes, Namibia

4

Chip's Tips on Jamaica

3

Canyons of the World

4

Chip's Tips on South Africa