Thomas Jefferson
Michael Anderson
The Sun, Stars, and Galaxies
Ronald Reagan
The Politics of Saving the Environment
Plant Reproduction, Growth, and Ecology
The Nature of Planets, Dwarf Planets, and Space Objects
Light
Investigating the History of Earth
Investigating the Global Climate
Investigating Plate Tectonics, Earthquakes, and Volcanoes
Investigating Minerals, Rocks, and Fossils
Investigating Earth’s Weather
Investigating Earth’s Oceans
Global Warming
Football and Its Greatest Players
Electricity
Earth and Its Moon
A Closer Look at Living Things
A Closer Look at Genes and Genetic Engineering
Biographies of the New World Power
Biographies of the New World
Biographies of the American Revolution
Baseball and Its Greatest Players
Abraham Lincoln