Standing,Working,Casual Clothing,45-50 Years,Young Adult Man,Young Adult,Indoors,Information,Concentration,Sitting,Short Hair,Watching,Gesturing,Grey Hair,Arms Raised,Adult,Woman,Man,20-25 Years,Young Adult Woman,Young,Talking,Teaching,Goals,Intelligence,18-19 Years,Education,University,Professional,Pointing,Classroom,Student,Teacher,Lecturer,Professor,Answering,Mature Adult,hands up,hands raised,Blackboard,College,Lecture Room,Tutor,Picking Out,lecture theatre –