abc
abstract
add
addition
answer
background
black
blackboard
block
board
build
calculate
chalk
chalkboard
characters
child
class
count
design
divide
division
easy
educate
education
equal
equals
equation
exam
examination
graphic
icon
idea
learn
lesson
mark
math
mathematic
mathematics
maths
message
minus
multiply
number
numbers
piece
play
plus
positive
preschool
primary
profit
question
school
set
sign
signs
simple
student
study
subtraction
sum
symbol
teach
teacher
test
text
texture
total
white
word
write