Teachers (including homeschoolers), can go to the izzit site and request one free DVD per year. The DVD's are on a variety of topics for current events in your school. We have personally viewed The Great Depression and Eminent Domain.
One DVD per year is free, but they do ask that you rate the video after viewing it. You must complete this before selecting another free title the following fall.
If your kids really like the movies, you can purchase many more selections.
If you know of any other good homeschooling freebies, please share!