Interactive Lincoln, Douglas, and Their Historic Debates Government and Civics K, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13+
Interactive Wilberforce, Lincoln, and the Abolition of Slavery Government and Civics, World History 6, 7, 8, 9, 10, 11, 12, 13+