blackboard
business
businessman
chalkboard
classroom
clever
concept
conceptual
education
exam
finger
formal
graduation
green
hand
handsome
idea
instructor
intelligent
knowledge
learn
lecture
lecturer
lightbulb
looking
male
man
mouth
open
people
person
portrait
professional
professor
school
seminar
solution
student
study
suit
teach
teacher
think
thinking
thought
thoughtful
training
university
young