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Senior chemistry professor giving a lecture in front of classroom full of students (shallow DOF; color toned image)
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Portrait of a pretty young college student writing on the blackboard during a maths class (color toned image)
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Senior chemistry professor writing on the board while having a chalk and blackboard lecture (shallow DOF; color toned image)
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Portrait of a pretty young college student writing on the blackboard during a maths class (color toned image)
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Handsome young man giving a speech at a conference
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Handsome young man giving a speech at a conference
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Pretty young elementary school/college teacher writing on the chalkboard/blackboard during a chemistry class (color toned image; shallow DOF) class (color toned image; shallow DOF)
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Pretty young college student or teacher washing the chalkboard/blackboa rd during class (shallow DOF; color toned image)
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Senior chemistry professor giving a lecture in front of classroom full of students (shallow DOF; color toned image)
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Senior chemistry professor giving a lecture in front of classroom full of students (shallow DOF; color toned image)
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Pretty young elementary school/college teacher writing on the chalkboard/blackboard during a chemistry class (color toned image; shallow DOF) class (color toned image; shallow DOF)
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Students in class (color toned image)
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Senior chemistry professor giving a lecture in front of classroom full of students (shallow DOF; color toned image)
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group of students study with senior professor in modern school classroom on creative class
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Pretty, young business woman giving a presentation in a conference/meeting setting (shallow DOF; color toned image)
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group of students study with professor in modern school classroom
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group of students study with professor in modern school classroom
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handsome mature teacher and students in computer lab classroom
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group of students study with professor in modern school classroom
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group of students study with professor in modern school classroom
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male student in classroom working homework and learning with laptop computer, students group in background
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group of students study with professor in modern school classroom
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handsome mature teacher and students in computer lab classroom
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Pretty young college student writing on the chalkboard/blackboard during a math class
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Pretty, young college student writing on the chalkboard/blackboard during a math class
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Pretty, young college student writing on the chalkboard/blackboard during a math class
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Senior chemistry professor giving a lecture in front of classroom full of students (shallow DOF; color toned image)
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Senior chemistry professor giving a lecture in front of classroom full of students (shallow DOF; color toned image)
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Senior chemistry professor giving a lecture in front of classroom full of students (shallow DOF; color toned image)
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Senior chemistry professor giving a lecture in front of classroom full of students (shallow DOF; color toned image)
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Physical equations (electromagnetics) hand written on paper
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Portrait of a pretty young college student writing on the blackboard during a maths class (color toned image)
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Portrait of a pretty young college student writing on the blackboard during a maths class (color toned image)
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Portrait of a pretty young college student writing on the blackboard during a maths class (color toned image)
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Senior chemistry professor giving a lecture in front of classroom full of students (shallow DOF; color toned image)
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abstract science and chemical molecule structure on white board in school classroom background
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abstract science and chemical molecule structure on white board in school classroom background
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Senior chemistry professor writing on the board while having a chalk and blackboard lecture (shallow DOF; color toned image)
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Senior chemistry professor giving a lecture in front of classroom full of students (shallow DOF; color toned image)
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pretty young college student/young teacher writing on the chalkboard/blackboard during a math class (color toned image; shallow DOF)
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