University of Houston
University of Houston: Engines of Our Ingenuity: Percy Julian
Brief profile of the life of African American chemist Percy Julian. Entry relates Julian's desire to achieve against the odds of early 20th century prejudice and discrimination.
Khan Academy
Khan Academy: Us History: 1800 1840: Irish and German Immigration
Famine and political revolution in Europe led millions of Irish and German citizens to immigrate to America in the mid-nineteenth century.