profession: smart caucasian bald man Stock Images

Yeah, this is what i call a good quality thing
Guess, there's nothing i can do about that
Amazed old professor reading a book
Old professor holding his hands folded and globus on his hand
Mature professor adjusting his eyeglasses
Oh, how could you say it, it's my favorite book
Balancing with amount of knowledge
Serious looking mature professor standing with hands folded
I need a piece of advice about managing this device
Old professor standing next to whiteboard and explaining something
Mature man pointing up and looks like explaining something
Ok, and now tell me what's this?
Well, are you ready to start your learning process?
Pensive mature man bitting his eyeglasses
Guess, i need some advice on that
Laughing old professor holding small blackboard
Quite contented with work result
Getting more familiar with new device
Old professor standing next to whiteboard and explaining something
This digital device is quite a thing
Old professor holding small blackboard
Would you take a closer look on this spot?
I have some problems with understanding that
Old professor holding globus and seems bothered with something
This subject needs a serious consideration
Mature professor seems to don't understand something
Surprised old professor holding globus and pointing on it
Old professor holding globus and looking aside
Feeling quite serious when thinking about science
Old professor seems like saying something and holding a tablet
Old professor balancing with ipad on his forehead
Old professor holding fists like bunny ears
Involved in thoughts mature professor bitting eyeglasses
New generations should learn from this
Serious mature professor adjusting glasses and seems like not understanding something
Serious looking old professor standing with his hands folded
Laughing mature professor standing with his hands folded and eyeglasses off
Old professor sitting in profile and using tablet
Old professor standing at th table and looking attentively on digital tablet
Old professor holding book and looks surprised
Serious looking mature professor holding book on his head
Old professor holding tablet with one hand
Serious looking old professor with eyeglasses on head and hands folded
Old professor holding digital tablet and seems like saying something
Excited old professor holding book and pointing on it
This science decision is not my thing
Excited mature professor adjusting eyeglasses
Smiling old professor holding a book with hands spread
Learning all these modern technologies
Hm, should i read more books or news already?
Who's ready to start study time?
Mature professor laughing hard about something
Mature man adjusting his eyglasses and looking lost
Old professor holding globus and looking hugely distured with something
Mature professor looking confused
Old professor holding globus and pointing on it
Well, and what do you think about this thing?
Old professor standing with his ahnds folded and eyes closed
Well, and what we're gonna do about that?
Old professor showing a tablet