man with glasses teaching in a classroom

19101940 40 4045 4050 40s 4550 adult and at bw black blackboard blackboards book books bow bygone camera caucasian caucasians chalkboard classroom classrooms confidence confident desk desks dressed dressedup educate educating education educational educator educators era ethnicity expertise expression expressions eye eyeglasses face facial fashioned front glasses headshot headshots historical holding horizontal in indoor indoors inside instruct instructing instruction instructor instructors interior interiors looking making man mature men mentor mentors nostalgia nostalgic number numbers numeral numeric numerical occupation old olds one only ovfirstset person photograph portrait portraits portraiture professional reading retro retrospective row schooling selfesteem selfrespect selfrespecting skill skilled skillful skills smirking something spectacles stand standing sureness teach teacher teachers teaching tie up view vintage visuals waistup well welldressed white wood year years