abacus
attention
background
backpack
book
boy
bunch
caucasian
child
childhood
concept
counting
device
education
educational
elementary
expression
floor
intelligent
interesting
iq
isolated
junior
kid
knapsack
knowledge
leaning
learning
lifestyle
male
math
mathematics
object
one
person
pupil
school
schoolboy
seated
single
sit
sitting
smart
studio
uniform
unit
using
wall
white
youth