These are the video tutorials that I recommend for learning more about the 1940 U.S. federal population census, and what you can find out about your ancestors in this census.
U.S. federal population censuses are my favorite type of record for doing U.S. genealogy and history research. These FREE tutorials provide extensive details about each federal population census.
The U.S. Census Bureau is hosting a FREE webinar about the most recent American Community Survey on September 11th. This is a great way for genealogy societies to learn more about their current and potential member demographics.