Missouri does have tenure. In Missouri, a teacher becomes tenured after he or she has been employed by the same school district for 5 successive years. Once a teacher is tenured he or she becomes a permanent teacher and their contract becomes indefinite, it renews from year to year.
Tenured teachers may be terminated. A tenured teacher in Missouri may be terminated for the following reasons:
1. Physical or mental condition unfitting him to instruct or associate with children.
2. Immoral conduct.
3. Incompetency, inefficiency, or insubordination in the line of duty.
4. Willful or persistent violation of, or failure to obey, the school laws of the state or the published regulations of the board of education of the school district.
5. Excessive or unreasonable absence from performance of duties.
6. Conviction of a felony or a crime involving moral turpitude.