Mature professor of university in smart casualwear standing in front of blackboard at lesson in auditorium and writing down formula
Related tags:
- professor
- school teacher
- student teacher
- teacher teaching
- expertise
- teaching
- male teacher
- teacher
- suit
- man suit
- business man suit
- whiteboard
- man work
- confidence
- skills
- business
- man office
- business professional
- classroom
- business man
- business success
- business person
- buisness man
- success
- professional
- learning
- person working
- lecture
- concentration
- educational
- office work
- business office
- blackboard
- office person
- people presentation
