I have access to a computer training room in Hallett Cove that I can use
and I'd like to put something formal together of what I've been teaching
myself over the past few months.
I think that the best teachers are those who have just taught themselves
or those who have been taught how to teach and enjoy the subject they're
teaching; I also know you have a talent for teaching and you're better
at it than you give yourself credit.
You might want to take a look at the Zend certification framework (look
for it at http://www.zend.com/). You probably won't want to or neetd to
teach precisely to its standards but it will give you a 'pre-made'
course outline that you can meld to your own needs.
It will, at the least, give you an outline of one of the certification
standards for PHP.