bag
behind
blackboard
boy
boys
bright
casual
caucasian
chalk
chalkboard
child
children
class
classmates
classroom
close
colorful
education
educational
equation
friend
girl
girls
group
happy
indoor
kid
kids
learn
lesson
lifestyle
many
mate
mates
math
mathematics
near
numbers
positive
pupil
pupils
rucksack
school
schoolchildren
smile
stand
standing
study
together
wear