This document defines and provides examples of primary and secondary sources. Primary sources are original materials created during the time being studied, such as diaries, autobiographies, speeches, historical documents, photographs, and letters. Secondary sources are materials created after the event as interpretations or analyses of primary sources, such as biographies, textbooks, newspaper or magazine articles analyzing past events, and almanacs. Both have advantages - primary sources provide first-hand accounts while secondary sources provide context and interpretation, but primary sources require more analysis and secondary sources reliability must be questioned.