Fat Lady is the guy is the lad you want to hear from.
He been teaching Juniors in England for years and has no doubt a
long list of do's and dont's.
(I'm still contact with him. I'll see if I can get him to throw
some hints your way)
I'd say enthusiasm is the chief ingrediant. If you can put across your
love for the game and infect them with that then everything is far easier.
If you are using a demo board (a must have accessory and now quite cheap).
Practise on it for an hour or so. Get to know how to use it.
Know your examples well and inside out.
Anticipate questions and have a reply ready for where you think
the questions will come.
Preparation is very important.
I've always like using games played by the class or players of
their class. They too can produce these wee gems we see in books.
It's the same game, the same rules.
Don't try to the wing it.
The class can see the game better than you and if you have to keep
moving 5 feet back to see what they can see then you will lose them.
Cannot stress enthusiasm, You have to get that across.
Of those crowd of kids I had in '82/83. Most are still playing, some are
running their own clubs, others went onto to become better player than me.
(That rat Ruxton was one them, wonder where he got that from?).
I Still get sleged when I meet them.
"I was a normal kid till I met you, you hooked me on chess."
I use to take them on field trips to watch a league match in action and
their first vist to the Edinburgh chess club was a real hook.
But that was '82/83 you now have to beat the XBOX and Playstation and
the other 100's of things that I never had to contend with. Good Luck.
(Hey thanks for the kind words PB. I enjoy what I do, I think that comes
across more than anything. The instructive points are by accident.