Teacher uses tablet in high school class, over shoulder view

indoors day medium group of people woman teenagers kids adolescence 40s adult middle aged african american ethnicity black asian chinese ethnicity multi-ethnic group teacher mentoring guidance teaching learning schoolchildren schoolgirls students pupils schoolboys school kids education knowledge school classroom lesson communication talking listening looking up interest attention smiling gesturing using computer tablet computer technology sitting study room high school desk part of person over shoulder view handheld slow motion