background
blackboard
blank
board
caucasian
chalkboard
child
childhood
class
classmates
classroom
clean
cleaning
clear
concept
copy
copy space
copyspace
education
elementary
erase
erasing
female
girl
green
hand
happy
kid
learn
lesson
little
one
people
person
primary
school
schoolgirl
slate
small
smile
space
sponge
standing
student
study
texture
white
wipe
wiping
young