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Man with beard and mustache wearing classic suit, sits on old fashioned armchair or sofa. Speaker, wise lecturer concept. Macho attractive and elegant on serious face and explaining expression.
Two happy busy female employees working together using computer planning project. Middle aged professional business woman consulting teaching young employee looking at laptop sitting at desk in office
Teacher explaining cell model to college students in science lab. Biology professor teaching to girls and guys in school the cell structure. High school students understanding bio structure in school.
CEO manager explaining to business associates how to overcome the company's crisis by presenting new ideas during a meeting in the conference room.
Two happy busy middle aged professionals man and woman business leaders partners checking document reading financial report talking working together on laptop computer in office at corporate meeting.

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