Learning Theories: ADDIE Model of Instructional Design
http://www.learning-theories.com/addie-model.html
Wikipedia Definition: Instructional Design
This is a very thorough article that explains instructional design and where it came from. There are multiple links to other related areas of interest too.
http://en.wikipedia.org/wiki/Instructional_design
E-Learning Guild provides a free book called 834 Tips for Successful Online Instruction
http://www.elearningguild.com/content.cfm?selection=doc.541
Down with Boring E-Learning!: Interview with e-learning guru Dr. Michael W. Allen
By Ryann Ellis, Learning Circuits Editor
This is a great article that’s an interview with one of e-learning’s most important authors. It has great tips and information. It’s worth the read.
http://www.astd.org/LC/2004/0704_allen.htm