young chemistry teacher the blackboard explains and shows pointer new topic |
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| navigate by keyword : adult blackboard board break chemistry children class classroom clean college concept education elementary empty female girl green happy high interior knowledge learn lesson man obligatory pedagogical pedagogics person pointer professor pupil room row school schooling science specification student study suit swept teach teacher training wall white woman work write young |
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| Young chemistry teacher at the blackboard explains and shows by pointer a new topic. Back to school |
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