teachers gradebook on computer keyboard and bottle hand sanitizer

2020 2021 2022 back background bacteria bottle bound cap care clear columns computer cope coping coronavirus distance education electronic flexible flu germs global gradebook grades gray green hand health hybrid influenza keyboard kill laptop learning ledger letters liquid new normal online pandemic person planning precautionary precautions reentry rows sanitizer school season sized spiral spread sterilize stress stressful students supplies teach teaching tools tracking trade transparent vaccinated vaccinations virtual viruses white writing