The National Museum of African American History and Culture in Washington D.C has much of its collection available online. Click on the link to explore the stories of remarkable and distinguished African-Americans.
Ellis Island National Park has a great website for you to learn about immigration. Click the link to hear real stories of people's experiences.
View Jacob Lawrence's entire series documenting The Great Migration.
Read letters written from African Americans asking about opportunities in the North
The National Archives has tons of primary sources about Chinese immigration and heritage.
This website provides a helpful overview of the African American migration experience by Henry Louis Gates Jr.