consists of short facts or statements, without explanation or elaboration
interprets or analyzes factual information
is information presented from one point of view, such as an opinion piece in a magazine, newspaper or blog
encompasses many points of view, presenting all aspects of an issue or story with factual accuracy, and without judgement or opinion
original materials: historical documents such as a handwritten letter, pages of a diary, an original recording of a news event, a newspaper article written at the time of the event, photographs, and original research reports.
are papers, books, magazine articles, journals analyzing, interpreting, or evaluating a primary source.
lists, compilations, digests, indexes or encyclopedia