addition
adult
attractive
beard
board
calculation
caucasian
chalk
chalkboard
classmates
classroom
college
confident
development
education
educator
elementary
group
happy
high
job
learn
lesson
male
man
marker
math
occupation
person
portrait
pretty
professional
professor
school
schoolchild
smart
smile
smiling
standing
student
study
studying
teach
teacher
teaching
tutor
university
whiteboard
work
young