If you are teaching US history and looking for some student friendly, engaging primary sources try the National Archives site http://www.archives.gov. Once there, you have access to materials that can help students and teachers research their history as well as the country’s history. Be aware, though, that the site is not designed for students so there may be a learning curve involved. The more defined the student’s search topics are, the easier the site is to use. Click on Teacher’s Resources http://www.archives.gov/education/, for ready to use lesson plans and advice on which documents are particularly student friendly.