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$People and education. Teacher writing on math equation on blackboard during lesson.$

Waist up view of British educator in early 50s standing amidst desks, holding notebooks, and smiling at camera.

Waist-up view of early 50s woman standing in front of class and smiling at camera, students at desks in background. Property release attached.

Mature caucasian man high school teacher writes mathematics formulas on the blackboard with chalk. Copy space. Education concept.

Frustrated senior teacher standing in front of a chalk board.

Science teacher writting at blackboard. Education and physics.

Lisbon, Portugal - Feb 28, 2020: Palace of Ajuda and King Dom Carlos I Statue- Lisbon, Portugal

Teacher using laptop to do an online / video class

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

Exterior view of University of Coimbra, Coimbra, Portugal. Students wearing black robes for photo.

Teacher in High School

Senior man sitting in his armchair as he holds a small alarm clock.

$An old professor teaches mathematics front of the blackboard$

retro vintage take photo shoot glasses beard

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

The sign the University of Porto, Portugal.

New Jersey

Statue of Portuguese King Denis (Dom Dinis) at the University of Coimbra, Portugal on 13 October 2023

Casa dos Bicos , José Saramago Foundation exterior in Lisbon, Portugal. February 1, 2024.

Front view of Brazilian man in casual clothing pausing from erasing chalkboard to smile at camera in Spanish-speaking elementary school.

Annoyed elderly man holds a marker, expressing irritation over an overlooked obvious point, standing against a plain grey blackboard

$Professor writing on the blackboard.$

Portrait Of Teacher By Blackboard In Classroom

Teacher at classroom sitting on desk, preparing for next school year. Waiting for students.

Lisbon, Portugal - December 5, 2022: National Museum of Science and Natural History (Museu Nacional de Historia Natural e da Ciencia).

Moçamedes, Namibe Province, Angola: façade of the old colonial train station with the CFM (Caminhos de Ferro de Moçâmedes') sign for the Moçamedes railway. The building is now used as a private clinic.

Adult teacher posing on blackboard.

Ponta Delgada, Portugal - April 27, 2023: A Banco De Portugal in Ponta Delgada.

An elderly professor of mathematics stands in his office at a white board with notes and explains the material to students.

Vila do Conde, Portugal- May 4, 2011: Biblioteca Municipal , public library, Vila do Conde, Portugal. Glass facade, garden, modern building exterior. Woman sitting in the foreground.

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