Profession Stock Photos: bald man

Old professor holding his hands folded and globus on his hand
Would you take a closer look on this spot?
Old professor holding globus and looking hugely distured with something
Serious looking old professor standing with his hands folded
Oh, how could you say it, it's my favorite book
Serious looking old professor with eyeglasses on head and hands folded
Quite contented with work result
Involved in thoughts mature professor bitting eyeglasses
Mature man pointing up and looks like explaining something
Mature professor looking confused
Serious mature professor adjusting glasses and seems like not understanding something
Serious looking mature professor standing with hands folded
Stunned mature professor adjusting his eyeglasses
Mature man adjusting his eyglasses and looking lost
Mature professor adjusting his eyeglasses
Old professor standing at the table and holding digital tablet
Old professor seems like saying something and holding a tablet
Getting more familiar with new device
Old professor standing at th table and looking attentively on digital tablet
Guess, i need some advice on that
Old professor holding a book and seems like talking to someone
Smiling old professor holding a book with hands spread
Surprised looking old professor holding a book
It's so easy, how can you don't get it?
Old professor standing next to whiteboard and explaining something
Ok, fellas, now it's time to remember few things
Yeah, this is what i call a good quality thing
Hm, should i read more books or news already?
Old professor holding small blackboard
Who's ready to start study time?
Ok, and now tell me what's this?
Old professor holding globus and seems bothered with something
This science decision is not my thing
New generations should learn from this
Old professor holding book and looks surprised
Laughing mature professor standing with his hands folded and eyeglasses off
This subject needs a serious consideration
Pensive mature man bitting his eyeglasses
Mature professor laughing hard about something
Excited mature professor adjusting eyeglasses
Serious looking mature professor holding book on his head
Balancing with amount of knowledge
I have some problems with understanding that
Oh, i didn't see it coming
Mature professor seems to don't understand something
Old professor holding tablet with one hand
Old professor holding digital tablet and seems like saying something
Old professor sitting in profile and using tablet
I need a piece of advice about managing this device
Old professor showing a tablet
Excited old professor holding book and pointing on it
Information in this book just blows me away
Old professor touching his beard and reading a book attentively
Old professor standing next to whiteboard and explaining something
Telling students all the needed info
Learning all these modern technologies
This digital device is quite a thing
Well, are you ready to start your learning process?
Laughing old professor holding small blackboard
Old professor balancing with ipad on his forehead