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$Mature math teacher with a book in front of a blackboard with formulas and text math$

Portrait of a music teacher standing with two female students in a classroomhttp://195.154.178.81/DATA/i_collage/pu/shoots/805013.jpg

Professional Male Teacher Gives Presentation, Uses Whiteboard with Technical Information and Charts to Illustrate Solution Options During Video Call. E-Learning and Remote Education Concept.

Mathematical formulas. Photography made with colored filters in the flash

Portrait Of Teacher By Blackboard In Classroom

college life

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

The mature adult male counselor poses for a photo in the meeting room of the community center between support group gatherings.

New Jersey

elderly man with a serious expression sits at a table in a busy, well-lit room, hands clasped. He reflects on future issues like climate change, job losses due to automation, and power concentration

Serious professor explaining algebraic formula by blackboard

University student posing in front of a black board.

Mid aged math professor standing in front of blackboard at the classroom. Male teacher looking surprised.

Science teacher writting at blackboard. Education and physics.

geometry drawing on page of old yellow book as background, algebra book as background

An astrophysicist is sitting in front of a black board and a laptop computer.

Science and black holes.Basic properties of black holes. A scientist writes physical and mathematical formulas on a blackboard with white chalk.Schwarzschild radius

Teacher. He is standing front of the white board and there is complex electrical formula on the board.

Portrait Of Smiling Man Against Blackboard

Professor writing on the blackboard.

Instructor blowing whistle to control classroom noise.

man with a mad hair and a labcoat infront of a blackboard,, holding a piece of chalk

Portrait of mature adult teacher in front of green chalkboard. He is wearing a button down shirt and a yellow necktie while looking at camera. Math formulas are written on blackboard. Shot in door with a medium format camera.

Crazy professor / scientist / lecturer with mad hairstyle wearing horn rimmed glasses and fake mustache standing in front of a whiteboard and pointing at formula E=mc with happy goofy face

Selective focus, Elderly smiling gray-haired man in educational class, teacher against background of blackboard and training equipment

Los Angeles, California, USA - June 13, 2012. The location is University of California, Los Angeles. Point of view of a professor teaching a class, from the outside looking in.

Genius nerd glasses silly man board math formula pensive gesture thinking expression

$University student posing in front of a black board.$

Free Images: "bestof:James Sacra Albus.jpg en James S Albus Dr James S Albus received a B S in Physics in 1957 from Wheaton College in Illinois and received an M S in Electrical"

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