1. Chemistry resources for the secondary education teacher on the www. Technical report, http://www.thecatalyst.org, as of January 2006.
2. Digital Imaging in Teaching Structures: A Rigorous Visual Approach
3. Electronic literacies: Language, culture, and power in online education. Lawrence Erlbaum Associates, Mahwah, NJ, 1999.
4. HowStuffWorks. Technical report, http://www.howstuffworks.com, as of January 2006.
5. Digital Library for Earth System Education (DLESE), Technical report, http://www.dlese.org/dds/index.jsp, as of January 2006.