Primary sources as part of world history
Each of these guides could be the basis of a short unit on "Unpacking Evidence."
"Guides to analyzing particular types of primary sources as part of world history. Each guide includes an introductory essay, a list of questions to ask when working with a particular type of evidence, interactive quizzes called "You be the Historian!", a sample analysis of one source, an annotated bibliography, and an annotated list of relevant websites."