4

Windsor Castle, England

4

Canterbury Cathedral, Canterbury, England

4

Stonehenge, England

4

Hadrian's Wall, England

3

Force

3

Rivers of the World

3

Harbors of the World

3

Power

3

Motion

3

Gravity

3

Christopher Columbus

3

Rabindranath Tagore

3

Team Sports

3

Thanksgiving Day

4

Maddy's Vermont Diary

4

Money

3

May Day

4

The American Revolution

4

Maddy's New York Diary

3

William Shakespeare

3

Mahatma Gandhi

3

Straits of the World

4

Early North American Settlers

3

Florence Nightingale

3

Lazy Jack

3

Pressure

3

Isaac Newton

4

Maddy's Rhode Island Diary

3

Lazy Jack

3

Charles Darwin