This video pretty much sums it up. Those working against charter schools, in particular so called Gulen charter schools do not have any real data backing any of their false allegations.
In fact, one blog uses another which uses another which then turns around and uses the first blog that began it all! It's nice to see that people are not being fooled.
There are many places you can go to get real facts about Concept Schools and their charter schools here in the mid-west. One of the best: conceptschools.info.