4

Famous Americans: Thomas Jefferson

4

Famous Americans: George Washington

3

Famous Explorers

3

Famous People - Part 1

3

Famous People - Part 2

4

Famous Americans: Abraham Lincoln

4

Famous Americans: Benjamin Franklin

3

Fjords of the World

3

Thurgood Marshall

4

Chip's Tips on Yemen

3

Francis Drake

3

Frederick Douglass

4

Chip's Tips on Laos

4

Chip's Tips on Uganda

4

Chip's Tips on Tanzania

3

Caves of the World

3

Coretta Scott King

3

Wetlands of the World

3

Genghis Khan

3

William Shakespeare

4

Chip's Tips on Namibia

3

John Cabot

4

Chip's Tips on Rwanda

3

Harbors of the World

3

Astronauts

3

Charles Darwin

3

Asteroids

4

Chip's Tips on Algeria

4

Chip's Tips on Chile

3

Mother Teresa