answering
asking
bench
book
boy
caucasian
childhood
children
class
classroom
communication
day
desk
education
elementary
female
friends
gesturing
girl
group
hand
indoor
knowledge
learn
learning
lecture
lesson
man
midadult
people
pupil
raised
school
schoolboy
schoolkid
sitting
smile
social
study
studying
teacher
teaching
times
together
university
university student