Try to remember that they are there to learn something new, but want it to be fun as well. If they have a great experience they will want to come back for more training. Remember the feeling you had in front of the IE when you went to become an instructor? Try to keep that thought in perspective that your students are having that same feeling, nervous & not sure what to expect. Do not bore them with just reading what is in the textbooks, but bring in some real life examples of what you are teaching thme & modify the content according to your audience. Above all have fun with it because your students can tell right away if you enjoy teaching or not.