4

Famous Americans: Thomas Jefferson

3

Famous People - Part 1

4

Famous Americans: Abraham Lincoln

4

Famous Americans: George Washington

4

Famous Americans: Benjamin Franklin

3

Famous Explorers

3

Famous People - Part 2

3

Individual Sports

4

Chip's Tips on China

3

Archipelagos of the World

3

Galaxies

3

John Cabot

4

The Sites & History of Coney Island

3

Malala Yousafzai

3

Meteorites, Meteoroids, and Meteors

3

Nyaminyami The Spirit of the River God

3

Sinkholes of the World

4

Chip's Tips on Qatar

4

After the American Civil War

3

Juan Ponce de León

4

Chip's Tips on Greece

4

Chip's Tips on Finland

3

Dinosaurs

4

Chip's Tips on Ivory Coast

3

Martin Luther King, Jr.

3

Genghis Khan

3

Drainage Basins of the World

3

Comets

3

Leonardo da Vinci

4

Chip's Tips on Gabon