adult
art
audience
back
bar
black
business
call
classroom
conference
crowd
crowded
data
education
finger
graph
group
growth
head
human
illustrations
instructor
lit
meeting
men
moving
outline
people
pointing
presentation
projection
school
screen
seminar
show
showing
silhouette
slide
slide show
spectator
success
teaching
tracing
university
up
watching
women