Minnesota Digital Curriculum Catalog

The Minnesota Digital Curriculum Referral Catalog (MDCRC), is a searchable index of digital OER for instructional purposes that are freely available and have the potential for alignment to Minnesota Academic Standards. MN teachers, staff, and subject matters members may contribute and rate the digital content. As the collection grows subject matter experts and peer review teams will use OER Commons tools and processes to assess the quality and alignment to standards of the digital content submitted to the catalog.
15 members | 485 affiliated resources

Teacher Selected Primary Sources: Images and Video

Population Density from the First Census, 1790

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A map of the eastern United States in 1790 showing the western extent of the territories to the Mississippi, and the distribution of European–American population at the time. The map is keyed to show areas of population densities ranging from under 2 inhabitants per square mile to areas with 90 or more inhabitants per square mile.

Material Type: Diagram/Illustration, Primary Source

Drawing of a Raft 02/14/1818

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On February 14, 1818, David Gordon received a patent for his raft design. When a patent is granted, it excludes others from making, using, offering for sale, or selling the invention. This drawing accompanied Gordon’s application.

Material Type: Diagram/Illustration, Primary Source

United States Population Density, 1900

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A map from 1912 of the United States, subtitled "Distribution of Population and Railways in 1900" showing the increase in population and expansion of the railroad network since 1850. The map is color–coded to show population densities ranging from areas with fewer than 2 inhabitants per square mile to areas of 90 or more inhabitants per square mile. Cities with populations over 8,000 are shown with circles proportionate to their populations at the time. The map shows the westward progression of the mean centers of population from 1790 to 1900.

Material Type: Diagram/Illustration, Primary Source

President Nixon speaking with astronauts Armstrong and Aldrin on the Moon

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On July 20, 1969, the Apollo 11 mission brought the first humans to the Moon. On that day President Nixon spoke with crewmembers Neil Armstrong and Buzz Aldrin via telephone-radio transmission. Source: This edited presentation features film footage from the White House Staff Super 8 Film Collection and audio from the White House Communications Agency Sound Recording Collection.

Material Type: Primary Source