abstract
abugida
alphabet
art
backdrop
background
banner
black
blackboard
board
chalk
chalkboard
class
classroom
communication
concept
consonant
education
english
eraser
idea
learn
lesson
letter
ngo
ngoo
ngor
ngu
school
sign
sketch
snake
student
symbols
teacher
text
thai
thailand
translation
university
wipe
word
words
write
writing