senior lecturer sleeping at working table
grey hair professor holding stack of books
grey hair professor standing near stack of books
Glass elevator in modern building
grey hair professor drawing with piece of chalk at blackboard
Back view of man presenting to students at a lecture theatre
senior lecturer leaning on table and looking away
grey hair professor looking at book
grey hair professor pointing on something with finger at blackboard
University students study in a classroom with male lecturer
Lecture at university lecture theatre, audience POV, closer
rear view of grey hair professor looking at blackboard
cropped image of professor drawing with piece of chalk at blackboard
smiling senior lecturer standing in classroom and looking at camera
grey hair professor covering face with book
pensive grey hair professor standing at blackboard with piece of chalk
bored young student sitting at desk during lesson and looking at camera
Man lecturing students in a university lecture theatre
side view of senior lecturer writing something on blackboard with piece of chalk
senior lecturer holding book and looking away
senior lecturer protecting himself of falling crumpled pieces of paper
senior lecturer looking at crumpled pieces of paper on table
grey hair professor holding piece of chalk and looking at blackboard
senior lecturer holding book and looking away
rear view of senior lecturer writing something on blackboard with piece of chalk
senior lecturer standing between falling crumpled pieces of paper
thoughtful senior lecturer sitting at table with pencil and notebook
grey hair professor pointing on something with pencil on blackboard
side view of grey hair professor drawing with piece of chalk at blackboard
Focused student taking notes during class at the university
