Teacher wearing a cloth face mask for protection during the Covid-19 pandemic preparing to clean the chalkboard of hand written equations and formulae

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Teacher wearing a cloth face mask for protection during the Covid-19 pandemic preparing to clean the chalkboard of hand written equations and formulae during class

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Size: 5015px × 3343px
Photo credit: © Michael Heim / Alamy / Afripics
License: Royalty Free
Model Released: No

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