20-25 20-30 25-30 40-45 40-50 45-50 50-55 50-60 55-60 adult americas argentinean attentiveness brazilian central america child children class college color colour conference considerate course educating educator fellow female fifties fifty forties forty furnishing furniture gal gentleman group guy head & shoulders hearing high-school highschool hispanic human human being indoor information inside instructing instruction intelligence juvenile kid lady latin american lecture lecturer listener male mexican mid life middle age middle aged middle-age middle-aged minor motioning person pupil schooling schoolmate schoolroom seated seriousness session side-view signaling solemn solicitous somber south america south american speech studying talking teen teenage thoughtful toiling training tuition twenties twenty waist-up wisdom women work youngster youthful adolescents attend attends attended attending auditoriums classmates classrooms colored colors desks educate educates educated educating gesture gestures gestured girls girl's schools hold holds held knowledgeable latins learn learns learned learnt lecture lectures lectured lessons listen listens listened men man's men's maturity occupations photographic professors profiles schools seminars seriously side views sit sits sat stood students teachers teach teaches taught teenagers tutorials tutor tutors tutored universities vertically verticals women's woman's work works worked young adults youths children colleges colours coloured conferences educate educates educated education educations educators females groups hear hears heard holds lectures males mexicans middle aged persons pupils schoolmates signaled solemnly speeches study studies studied talk talks talked teens toil toils toiled
