At least 12 states report issuing half or more of new certificates to out-of-state teachers.
Some state leaders say they don't plan to make changes; others are already on the record as favoring less rigid approaches.
A Minnesota panel must allow out-of-state teachers to earn licenses via a portfolio process.
Take a look at the most popular Teacher Beat items from 2015.
The fiscal 2016 spending bill doesn't include a policy rider to prevent the regulations from taking effect.
New York won't use state test scores in teachers' reviews for at least four years.
If teachers walk off the job, it will be the second strike in three years; Chicago teachers struck in 2012 for seven days.
The change to the Title II program will benefit Southern states, while Michigan, New York, and Pennsylvania, among others, will see their allocations shrink.
The emails, obtained through an open-records request, include sexual references.
A proposal in the Every Student Succeeds Act to allow states to set up independent teacher-preparation academies is raising some concerns.