What value should we place on primary sources of historical events? Objective Students will recognize various types of primary sources used by historians Students will consider differences between types of primary sources and their usefulness Students will understand primary sources are valuable but incomplete stories of events of the past Background Primarily Me is a lesson that focuses on the various sources that combined tell a story of Whitman Mission and the events that occurred here. Primary sources about the site vary from archeological resources to pictures and drawings made when the m Duration: 60 Minutes.