Old male teacher portrait closeup face of professor or teacher on blackboard isolated

Related tags:

• retirement
• tutor
• class
• old
• professor
• school teacher
• blackboard
• senior
• elderly
• learning
• study
• education
• chalkboard
• knowledge
• mature
• face
• school
• male teacher
• face portrait
• portrait
• male
• teacher
• age
• 17+