These are very hard to get for teachers in that state. They involve rigorous testing and study.
Credentials are proof of fact or information about qualifications. Examples are driver's license, state id, and social security card. It is important to carry them with you at all times.
The synonym of credentials or words related to this work are, id, mastery, ability, and compentence. These skills verify your abilities to do task or jobs.
Login credentials are information that is given to autheticate who you really are. Personal questions can be a form of login credentials.