Ask about the voltage requirements and maximum capacity. If presenting via telecommunications, check the availability and the type of the telephone line and access to the internet. A large screen may be needed to enable participants to see a software demonstration. Check this equipment to make sure it all works and is clear to all participants. Be sure to tell personal stories about teaching social studies with technology.
Anecdotes are powerful.
If there will be only one computer, be creative in establishing an agenda so that each participant will have a little time at the computer. Find one teacher or more who knows how to use the mouse. Ask teachers to take turns using the computer while the software is being described. Use a large TV screen or some other projecting device so all participants can view what is happening. Divide participants into two or more groups.