adult
beautiful
blackboard
board
casual
caucasian
chalkboard
class
classroom
college
down
education
explain
female
full
girl
glasses
green
holding
indoors
knowledge
learn
learning
lecture
length
lesson
looking
occupation
one
people
person
pointer
pointing
posing
profession
school
schooling
schoolwork
science
standing
stick
study
studying
subject
teach
teacher
teaching
university
woman
young