| A | B |
| primary source | an original document, artifact, picture, journal, or a record from a person who participated in the event |
| secondary source | information that comes from other sources (either primary or secondary) such as a textbook or encyclopedia |
| historical context | the historical setting for an event or primary source |
| frame of reference | the perspective from which you view historical or current events and issues |
| bias | slanted coverage or one-sided information about an event; prejudiced information |
| sequence | putting things in logical order |
| generalization | usually a broad assertion that something is always true; used to organize and summarize information obtained from analyzing the facts |
| validity | whether or not something is "valid" or true |