Kristina's Sandbox/My Project/Visual Design
This Wikipedia page explores some very valuable Design elements and principles. This very valuable quote is shared on the page:
William Lidwell famous admonition (forewarning) roughly stated in Universal Principles of Design: "The best designers sometimes disregard the principles of design. When they do so, however, there is usually some compensating merit attained at the cost of the violation. Unless you are certain of doing as well, it is best to abide by the principles." 
This page on Wikipedia explores Instructional design and may instructional models. It will also help inform the tool created to assist in developing well-designed learning resources.
- Lidwell, William; Kritina Holden (2003). Universal Principles of Design. Beverly, Massachusetts: Rockport Pub, Inc.. ISBN 979-1592535873.