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?
Aldridge Rhine, who earned her bachelor’s from UMSL in 2000, decided to embark on a career in optometry after reading a story in UMSL Magazine.