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Science teacher writting at blackboard. Education and physics.

hand of arabic chemistry teacher with chalk drawing formulas and elements, signs and symbols of chemistry, chemist education concept on blackboard

Professor Standing By Blackboard In Classroom

A male professor on the university campus, holding documents and looking very frustrated.

Portrait of male teacher at a university sitting in a comfortable leather chair at the department.

Indoor image of an exhausted male teacher or professor feeling sleepy in the classroom. He is standing against blackboard where his thought bubble is drawn depicting his sleepiness condition. The bespectacled man is in formal shirt, sweater and coat. One person, waist up, horizontal composition with copy space.

Autistic man with learning disabilities going back to school holding notebooks.

Serious professor explaining algebraic formula by blackboard

The young businessman tries to solve problems

Portrait of Stephanus Johannes Paulus Kruger (Paul Kruger), 3rd State President of the South African Republic (1825 - 1904). Vintage photo etching circa late 19th century.

Portrait Of Teacher By Blackboard In Classroom

On the university campus, a male professor is giving an angry lecture.

Portrait of smiling male student solving algebra equation on whiteboard in classroom

Professor, librarian, or adult student researching in the library.

Instructor blowing whistle to control classroom noise.

Autistic man with notebook standing on school campusnot

Mature professor of university in smart casualwear standing in front of blackboard at lesson in auditorium and writing down formula

University student posing in front of a black board.

Portrait Of Smiling Man Against Blackboard

Smiling scientist looking to camera.

Senior teacher writing equations on a blackboard in a classroom

Man in front of huge blackboard. He knows answer.

Teacher plotting a revenge in classroom.

Autistic man with notebook standing on school campusnot

Successful mature teacher or professor in smart casualwear holding piece of chalk while standing by blackboard in front of camera in classroom

Professor of the Department of Applied Mathematics in classroom at the blackboard writes formulas for students.

Thomas Hart Benton a portrait from old American money

University student posing in front of a black board.

Free Images: "bestof:Student at Johns Hopkins University Hugh L. Dryden proved himself especially gifted in physics and mathematics and began advanced study with Professor Joseph"

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