Some organizations like to promote the teaching of history through architecture, immigration patterns, or transportation innovations. This project encourages students to learn about history through "the enticement of solving historical cold crimes." It's a compelling and intriguing premise, and the project, initiated in 1997, builds on the ideas of document-centered inquiry and "active learning" pedagogical thinking. First-time visitors should view the video introduction to the project, and then use the "Quick Access" drop-down menu to look at the twelve different mysteries featured. A good one to start with is the "Where is Vinland?" project. Here visitors can learn about this Viking colony, learn about historical artifacts associated with the colony, and then review the contemporary and historical findings on the subject. Moving on, the "Teachers" section includes lesson plans, briefing sheets, and student-oriented briefing sheets for use in the classroom.