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Medium
- instructional materials7
- black-and-white photographs3
- documentaries and factual works3
- sound recordings3
- interviews2
- lesson plans2
- photographs2
- slide shows2
- articles1
- maps1
- online exhibitions1
- oral histories (literary works)1
- resource units1
- slideshows1
- teaching guides1
- texts (document genres)1
- transcripts1
- video recordings (physical artifacts)1