@ehBeth,
I've looked at various other stats for different states and they are all conflicting. Some states say they cost less according to the stats, some say more and another said there was no difference in cost.
I've read another account at another state that said the only reason that Charter school was more because of the initial construction costs. And another analysis that stated that the cost of actual educating the student was less, but the administration was more.
Bascially all this shows is that it can cost less if done correctly. Same type as I've shown as private schools - it can cost less, but it doesn't always result in that way.
The more important thing - is how come some cost less and others do not - and if what impact the cost actually has on the end result.