Differentiating between primary and secondary sources.
Primary sources are the raw materials of history, the first-hand testimony or direct evidence - original documents and objects - left behind and created by participants, witnesses, or recorders who were present at and experienced the events or conditions being documented at the time of the topic under study.
Examples of primary sources:
Secondary sources are materials that digest, analyze, evaluate and interpret information contained within primary sources or other secondary sources.
Examples of secondary sources: