High school kids raise hands, teacher sitting at their desk

indoors day five people woman girls boy teenagers kids adolescence 40s adult middle aged mixed race person african american ethnicity black caucasian asian chinese ethnicity medium group of people multi-ethnic group incidental people teacher mentoring guidance teaching learning schoolchildren schoolgirls pupils schoolboy education knowledge school classroom lesson communication attention sitting raising hands volunteering answering question looking at each other high school desk books waist up over shoulder view handhed slow motion