Cloud (1988) suggests writing an introductory course (non-majors welcome) around the first three or four billion years of Earth history. These early eons are very exciting from an Earth system standpoint because the atmosphere, hydrosphere, geosphere, and biosphere went through almost all of their major changes before the Cambrian.
ISSN 1089-9995
find it in: Worldcat (for local availability)
Journal of Geoscience Education website
