The One Day:
An 8 hour smorgasbord of materials, techniques and instructions.
Mostly demonstrations and discussions of how-to's and how-not-to's. Some hands on.
The two-day format works well for art departments of small or medium sized universities, community art centers and other groups that wish to know the basics of materials and techniques while working toward a definite goal.
This format also works well for small to mid-sized manufacturing companies as the materials knowledge and techniques can often be used in previously unimagined ways.