young woman teacher college instruction university classroom blackboard described chalk projection from |
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| navigate by keyword : adult back blackboard casual caucasian chalkboard class classroom college computer desk difficult education female formula girl glasses group happy indoors knowledge laptop learn learning lesson library man mathematics nobody notebook object people school sitting smile smiling stack student students studying tablet teacher technology university using view wisdom woman write young |
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| Smiling female teacher. Young woman teacher in college. Instruction in a university classroom. Blackboard described by chalk. Projection from the data projector |
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