A high school or university instructor posing wit photo (60.0)

A science technician at work in the laboratory stock image (60.0)

Blank Chalkboard, Empty chalkboard (146.42)

book open (120.2)

Businessman working on a laptop computer against photo (130.0)

Fine presentation stock image, Young businessman doing a presentation on a empty whiteboard. Copy space. (114.2)

Man and Woman Business Team at Office Building photo, An attractive, diverse man and woman business team at the office building (90.0)

marketing strategy stock image, special toned and soft fx, focus on the pen (165.25)

Sailboats on a clam spring day near the Universit stock image (340.18)

Satisfied young businessman with a lap top comput image (130.0)

Students studying on the floor picture, Casual students studying on the floor over a white background (223.22)

tableau noir (81.10)

Teacher using a laptop to teach students stock photo (60.0)

Teacher using a laptop to teach students image (60.0)