I don't know what you are teaching, but it can be very useful to get the participants to DO something, rather then just yakin' at them for hours on end. It is obviously highly dependent on the topic and how much leeway you have in the training.
Some of the techniques can be pretty goofy (silly games etc.) but they don't have to be, just something to get the participants to move around, talk, write, discuss etc. Get them involved. One theory is to make sure you engage their Hearing, Seeing, and Moving (touching, manipulating etc.) during each of the major topics of the training. The Moving one of course can be the most difficult to figure out.
As and example of the Moving concept (really just figuring out a way to get them to move): If you were teaching about fuel mixture, you could designate some of the participants as fuel and some as air, then move them around in the room temporarily to show the different mixtures for different fuel. Like I said, silly, but it gets them moving, and they will very likely remember whatever concept you are demonstrating more then just a note in 4 hours of lecture.
As far a learning is concerned, one of the powerful concept to understand is reinforce your major points. You can't expect people to remember everything you teach, but you want to make sure the get the major points (or concepts), so mention them multiple times, from multiple angles and do periodic reviews of you main and sup-points.
Be brave, don't show fear (they feed on that
). Confidence! Remember, they don't know what you are talking about, so even if you feed them crap, they won't know
, just kidding, but maybe that will give you confidence.
There are 10 types of people in this world. Those that understand binary and those that don't