adult
arm
background
black
blackboard
board
bulb
business
chalk
chalkboard
clear
communicate
communication
concept
conceptual
dark
drawing
education
female
hand
holding
idea
indoors
learn
lesson
light
lightbulb
manual
message
outdated
plan
point
pointing
present
round
scribble
show
sketch
space
strategy
teach
texture
touch
way
white
woman
write
writing
written
young