[noer]

It varies state to state. Some states require you to have a masters degree, some require you to have a masters degree or being the process of obtaining one, some states require you to have a masters but will waive that requirement if there's a need and some states require only a bachelors degree. Edit: there is a list of state requirements here: https://www.asha.org/Advocacy/state/StateTeacherCredentialin...

[panzagl]

That list is for speech teachers, most 'regular' K-12 teaching positions only require a bachelor's.