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Student raising her hand in an engineering class while professor is at the white board writing about chemical bonds
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Students seated in an engineering classroom listening to professor discuss chemical bonds Benzene rings
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Students listening to their teacher in classroom at the university
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Students passing notes to each other in classroom behind teachers back at the university
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Students listening to lecturer explain formula at top of class at the university
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Students listening to their teacher in classroom and raising their hands at the university
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Students standing in a row in class smiling at camera at the university
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Students writing on the whiteboard together in class at the university
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Students writing on the whiteboard together in class while others watch at the university
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Students writing on the whiteboard together in class with one smiling at camera at the university
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Students and lecturer smiling at camera in classroom at the university
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Students standing in a line in class smiling at camera at the university
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Students passing notes to each other in classroom at the university
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Student writing on the whiteboard in class smiling at camera at the university
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Vector illustration of a modern lesson top view in flat design
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Whiteboard shaped as speech bubble, vector eps10 illustration
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Handsome African-American college student (or teacher) doing trigonometry equations on the white board.
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Whiteboard with hand drawn growing bar graph, vector eps10 illustration
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Students standing and smiling at camera holding notepads in classroom
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Female scientist looking at the camera while standing in front of a white board
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Dark-haired scientist drawing charts on the blackboard in a lab
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Square whiteboard on white background, vector eps10 illustration
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Vector - Whiteboard with School Results Grades with Chalk
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Electrical engineering student draws a diagram of a circuit on the white board while teacher looks on.
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Dark-haired scientist explaining charts while looking at the camera in a lab
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Electrical engineering student learns how to diagram a circuit.
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