Online tutorial (West Texas A&M University, USA, 2002-2021)

This map shows the territorial expansion of Germany between 1935 and 1939, that is, before the beginning of the Second World War (USA: GHDI 2023). 

Learn about the four major types of deserts, the surprising amount of wildlife some of them contain, and how new desert areas are beginning to form. (4 minutes / National Geographic 2020)

Laws that enforced racial segregation in the South between the end of Reconstruction in 1877 and the beginning of the civil rights movement in the 1950s (Britannica 2017).

From the stock market crash in 1929 through the new millennium beginning in the year 2000?, editorial cartoonist Herb Block has chronicled the nation’s political history, caricaturing twelve American presidents from Herbert Hoover to Bill Clinton.? (LOC 2011)

Immigrating to the United States through Ellis Island at the beginning of the 20th century

From the stock market crash in 1929 through the new millennium beginning in the year 2000, cartoonist Herb Block has chronicled the political history, caricaturing twelve American presidents from Herbert Hoover to Bill Clinton (USA: LOC 2011-20).

The Gilder Lehrman Institute of American History is one of the great repositories of information about American history and culture. The Americas to 1620 exhibit, featured here, explores the world of North America, beginning with the settlements that began between 20,000 BCE and 9,500 BCE (2016).

The famous essay from 1920 stands at the beginning of the U.S. Civil Rights Movement. A first version appeared in 1910 (USA: Library of America 2021).

Parts 1 and 2 (top menus, left to right) demonstrate basic principles of meiosis, fertilization, and inheritance using the same pea traits that Mendel studied. We suggest you start at the beginning to brush up on the basics. But if you just can’t wait to play the game, skip ahead to Part 3, The Princess and the Wrinkled Peas.