3. Right wingers want to pretend that poverty and racism don't matter.
If they can blame the teachers for the students' poor performance, then they can continue to justify their abhorrent economic policies. If we start to connect the students performance to their economic situations and realize that the only consistent way to improve is by decreasing the percentage of children who live in poverty, well their nasty Randian philosophies go down the toilet where they belong. The basis of the whole philosophy is that poor people are just getting what they deserve. But you can't really blame children for their parent's deficits. Teachers are just a scapegoat whereby the 1% is justifying their greed at the expense of children.