2
apple
c
chalk
college
concept
design
draw
drawing
e
education
educational
emc
emc2
equals
equation
formula
graphic
hand drawn
icon
illustration
isolated
knowledge
law
learn
learning
lesson
lessons
m
math
mathematics
mc
mc2
pattern
physicist
physics
pictogram
school
science
scientific
sketch
study
studying
symbol
teach
theory
university