I just spotted this video from Soomo Publishing on Ken Halla's excellent blog for world history teachers. I thought it was a pretty nice overview of the social sciences and could be used when we find our students struggling to understand how psychology and sociology (for example) are different. If you cannot see the video embedded above, check out this link at YouTube.
And if you teach US history, civics and/or US government and don't know about Soomo Publishing's most famous video with nearly 3 million YouTube views, well, it's too late to apologize.
--posted by Steve