Frankly, I don't know why he even bothered to respond. What KA is doing might not be perfect but it is one serious attempt to move education forward in some form. They deserve nothing less than admiration and support. I am sure that they welcome and encourage constructive criticism.
Aside from that, the only way the "(highly unionized) teachers do it better" argument can hold water is if the (highly unionized) teachers start producing students that actually place in a reasonable range in international comparisons.
Aside from that, the only way the "(highly unionized) teachers do it better" argument can hold water is if the (highly unionized) teachers start producing students that actually place in a reasonable range in international comparisons.