3035 years
30s
40s
american
attending
attention
audience
auditorium
caucasian
class
classroom
college
communication
concentration
education
european
focused
french
german
glasses
group
group of people
high school
higher
indoor
interest
knowledge
learning
lecture
lesson
listening
man
notes
pen
person
presentation
scholar
school
seminar
sitting
smart
student
studying
table
thoughtful
university
wisdom