Arphy may be nearly 100 % wrong and he'll get the post shredded in the next day or so (if people work at it) but he has made a good honest effort and the post is clear and well structured. It isn't all on topic but he's done no worse on that than most of us most of the time.
This is so excellently laid out it is hard to pick a bit to represent it but the final paragraph seems to be pretty good on it's own:
But no doubt that will cause upset by the creationists. Just about anything you do will be considered controversial by one side of the debate or another no doubt - hence why my prime advice is to not go down that route at all and just teach the evolution exists, is in conflict with a literal interpretation of Genesis and you can debate some of the ways to handle this conflict.
That is, take a totally different tack than others have been discussing.