Rachel M. Cohen writes in The American Prospect about the curious efforts of charter schools to prevent their teachers from joining a union.

When it suits their purposes, they insist their employees are private employees of a private corporation, and therefore exempt from unionization.

But the y also, in other jurisdictions, say their employees are public employees of a state actor, and therefore exempt from unionization.

The only constant is their effort to prevent their overworked teachers from forming a union.

What charter teachers can depend on is that their employers will harass them if they display any interest in joining a union.