the biggest challenge i think we have, um, is something that shanker said a long time ago. i said in 2004 or '5, shanker said beforehand, feldman, also one of my successors, mark tucker has just said recently how do we actually change schools to, how do we change schools from this industrial model to a knowledge model? and how do we use collective bargaining in if a class model? how do we actually do these kinds of things? so what i would like to see is let's try some of these experiences. green dot was one of the experiments we tried in the terms of seeing how you can mesh. in a 360-degree accountability system a lot of the tools teachers need, how do you mesh this? and i think given that we have this, you know, huge, um, this 15,000 school districts in the united states, 100,000 schools in the united states. we could try some of this kind of experimentation in a way to see can we, can we build on new systems? not the entire new system, but can we build some experiment places? >> >> a hot like charter schools. >> well, it was supposed to be a lot of what charter schools we