Every show I have attended has had several schoolroom product training sessions. Some are hosted by important manufacturers and some are hosted by the company whose show you are attending. Attend them. Yes, you might have been selling that product well, but there is always something new to learn ... and maybe there is a new product they are introducing that you know nothing about. If you attend a training session that does not offer a great feature, advantage, benefit demonstration, stay late and ask for one. The best companies have their demos in writing.