Does tenure make teachers invincible and prone to slacking, or does it keep good teachers safe?

Does tenure make teachers invincible and prone to slacking, or does it keep good teachers safe?
Does tenure make teachers invincible and prone to slacking, or does it keep good teachers safe?
Does tenure make teachers invincible and prone to slacking, or does it keep good teachers safe?
Jones previously served as president of both the Missouri Optometric Student Association and the Fellowship of Christian Optometrists and has been heavily involved in the college.