teacher bearded man hold documents and microscope chalkboard background biology his passion demanding |
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| navigate by keyword : adult background beard bearded biology chalkboard cheerful class classroom college demanding documents education educator explaining eyeglasses face formal high hipster his hold knowledge lecturer lesson man mature microscope occupation paperwork passion prepare principal read reading school schoolmaster smart smile stationery study suit teach teacher test theory university |
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| Teacher bearded man hold documents and microscope chalkboard background. Biology is his passion. Demanding teacher. Lecturer in classroom. Explaining theory. College and high school. Prepare for test. |
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