The Four Elements
- Comprehensive look at the history of hip hop music. Includes pictures and links.
- http://4elms.straightup.no

The Evolution of Rap Music in the United States
- 1993 essay includes guidelines for teaching about rap music (and graffiti) to middle and high school students. Includes a bibliography and brief lesson plans.
- http://www.yale.edu/ynhti/curriculum/units/1993/4/93.04.04.x.html

Old School Hip Hop
- Features biographies, recordings and videos from old school rap artists who performed prior to 1986.
- http://www.oldschoolhiphop.com/