Teacher tenure refers to a policy that provides job security for teachers after they have completed a probationary period. Once a teacher earns tenure, it means they cannot be fired without just cause or due process. The purpose of this policy is to protect the rights and interests of educators while also ensuring academic freedom in schools. Tenure can provide stability for both teachers and students, as well as promote innovation and risk-taking in teaching methods. However, some argue that tenure may prevent the removal of underperforming or ineffective teachers, which could negatively impact student learning.