Missouri's would stop tenure for new hires starting next year. Iowa's would revoke tenure for all professors.
Adjunct and non-tenure track professors are joining unions, hungry for benefits and job security they currently lack. And in a twist, they're not always joining the unions you might expect.
States across the country are trying to make it easier to fire ineffective teachers by changing the tenure process. But some people are still wondering... what does K-12 tenure mean?