United Streaming

"Discovery Education provides engaging digital resources to schools and homes with the goal of making educators more effective, increasing student achievement, and connecting classrooms and families to a world of learning." (United Streaming website)

I find this to be an extremely valuable tool- from video clips to primary source documents, this resource puts engaging images right at your fingertips.  You can find and use a segment that lasts 2-3 minutes to reinforce or introduce your topic or you can use a full-length video to enrich your lesson/focus.  It is by subscription only but many school districts have purchased subscriptions since so many teachers find it so valuable.  The website also lets you store and organize your downloaded videos.

http://streaming.discoveryeducation.com/index.cfm