I know a lot of us come to the discussion forum to look for new activities for our classes, but don't forget to check out the articles that OER has posted on each topic. I recently started Unit 6 in AP World History (Imperialism). I ditched the textbook this unit and instead I am having students read and annotate primary and secondary sources. I pulled a TON from OER and my students are loving them! They said they are easier to read and understand compared to the textbook. They're still getting the required info and I'm not having to fight them read it!